This source file includes following definitions.
- uhci_set_next_interrupt
- uhci_clear_next_interrupt
- uhci_fsbr_on
- uhci_fsbr_off
- uhci_add_fsbr
- uhci_urbp_wants_fsbr
- uhci_fsbr_timeout
- uhci_alloc_td
- uhci_free_td
- uhci_fill_td
- uhci_add_td_to_urbp
- uhci_remove_td_from_urbp
- uhci_insert_td_in_frame_list
- uhci_remove_td_from_frame_list
- uhci_remove_tds_from_frame
- uhci_unlink_isochronous_tds
- uhci_alloc_qh
- uhci_free_qh
- uhci_cleanup_queue
- uhci_fixup_toggles
- link_iso
- link_interrupt
- link_async
- uhci_activate_qh
- unlink_interrupt
- unlink_async
- uhci_unlink_qh
- uhci_make_qh_idle
- uhci_highest_load
- uhci_check_bandwidth
- uhci_reserve_bandwidth
- uhci_release_bandwidth
- uhci_alloc_urb_priv
- uhci_free_urb_priv
- uhci_map_status
- uhci_submit_control
- uhci_submit_common
- uhci_submit_bulk
- uhci_submit_interrupt
- uhci_fixup_short_transfer
- uhci_result_common
- uhci_submit_isochronous
- uhci_result_isochronous
- uhci_urb_enqueue
- uhci_urb_dequeue
- uhci_giveback_urb
- uhci_scan_qh
- uhci_advance_check
- uhci_scan_schedule
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28
29 static void uhci_set_next_interrupt(struct uhci_hcd *uhci)
30 {
31 if (uhci->is_stopped)
32 mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies);
33 uhci->term_td->status |= cpu_to_hc32(uhci, TD_CTRL_IOC);
34 }
35
36 static inline void uhci_clear_next_interrupt(struct uhci_hcd *uhci)
37 {
38 uhci->term_td->status &= ~cpu_to_hc32(uhci, TD_CTRL_IOC);
39 }
40
41
42
43
44
45
46
47 static void uhci_fsbr_on(struct uhci_hcd *uhci)
48 {
49 struct uhci_qh *lqh;
50
51
52
53
54 uhci->fsbr_is_on = 1;
55 lqh = list_entry(uhci->skel_async_qh->node.prev,
56 struct uhci_qh, node);
57 lqh->link = LINK_TO_QH(uhci, uhci->skel_term_qh);
58 }
59
60 static void uhci_fsbr_off(struct uhci_hcd *uhci)
61 {
62 struct uhci_qh *lqh;
63
64
65
66 uhci->fsbr_is_on = 0;
67 lqh = list_entry(uhci->skel_async_qh->node.prev,
68 struct uhci_qh, node);
69 lqh->link = UHCI_PTR_TERM(uhci);
70 }
71
72 static void uhci_add_fsbr(struct uhci_hcd *uhci, struct urb *urb)
73 {
74 struct urb_priv *urbp = urb->hcpriv;
75
76 urbp->fsbr = 1;
77 }
78
79 static void uhci_urbp_wants_fsbr(struct uhci_hcd *uhci, struct urb_priv *urbp)
80 {
81 if (urbp->fsbr) {
82 uhci->fsbr_is_wanted = 1;
83 if (!uhci->fsbr_is_on)
84 uhci_fsbr_on(uhci);
85 else if (uhci->fsbr_expiring) {
86 uhci->fsbr_expiring = 0;
87 del_timer(&uhci->fsbr_timer);
88 }
89 }
90 }
91
92 static void uhci_fsbr_timeout(struct timer_list *t)
93 {
94 struct uhci_hcd *uhci = from_timer(uhci, t, fsbr_timer);
95 unsigned long flags;
96
97 spin_lock_irqsave(&uhci->lock, flags);
98 if (uhci->fsbr_expiring) {
99 uhci->fsbr_expiring = 0;
100 uhci_fsbr_off(uhci);
101 }
102 spin_unlock_irqrestore(&uhci->lock, flags);
103 }
104
105
106 static struct uhci_td *uhci_alloc_td(struct uhci_hcd *uhci)
107 {
108 dma_addr_t dma_handle;
109 struct uhci_td *td;
110
111 td = dma_pool_alloc(uhci->td_pool, GFP_ATOMIC, &dma_handle);
112 if (!td)
113 return NULL;
114
115 td->dma_handle = dma_handle;
116 td->frame = -1;
117
118 INIT_LIST_HEAD(&td->list);
119 INIT_LIST_HEAD(&td->fl_list);
120
121 return td;
122 }
123
124 static void uhci_free_td(struct uhci_hcd *uhci, struct uhci_td *td)
125 {
126 if (!list_empty(&td->list))
127 dev_WARN(uhci_dev(uhci), "td %p still in list!\n", td);
128 if (!list_empty(&td->fl_list))
129 dev_WARN(uhci_dev(uhci), "td %p still in fl_list!\n", td);
130
131 dma_pool_free(uhci->td_pool, td, td->dma_handle);
132 }
133
134 static inline void uhci_fill_td(struct uhci_hcd *uhci, struct uhci_td *td,
135 u32 status, u32 token, u32 buffer)
136 {
137 td->status = cpu_to_hc32(uhci, status);
138 td->token = cpu_to_hc32(uhci, token);
139 td->buffer = cpu_to_hc32(uhci, buffer);
140 }
141
142 static void uhci_add_td_to_urbp(struct uhci_td *td, struct urb_priv *urbp)
143 {
144 list_add_tail(&td->list, &urbp->td_list);
145 }
146
147 static void uhci_remove_td_from_urbp(struct uhci_td *td)
148 {
149 list_del_init(&td->list);
150 }
151
152
153
154
155 static inline void uhci_insert_td_in_frame_list(struct uhci_hcd *uhci,
156 struct uhci_td *td, unsigned framenum)
157 {
158 framenum &= (UHCI_NUMFRAMES - 1);
159
160 td->frame = framenum;
161
162
163 if (uhci->frame_cpu[framenum]) {
164 struct uhci_td *ftd, *ltd;
165
166 ftd = uhci->frame_cpu[framenum];
167 ltd = list_entry(ftd->fl_list.prev, struct uhci_td, fl_list);
168
169 list_add_tail(&td->fl_list, &ftd->fl_list);
170
171 td->link = ltd->link;
172 wmb();
173 ltd->link = LINK_TO_TD(uhci, td);
174 } else {
175 td->link = uhci->frame[framenum];
176 wmb();
177 uhci->frame[framenum] = LINK_TO_TD(uhci, td);
178 uhci->frame_cpu[framenum] = td;
179 }
180 }
181
182 static inline void uhci_remove_td_from_frame_list(struct uhci_hcd *uhci,
183 struct uhci_td *td)
184 {
185
186 if (td->frame == -1) {
187 WARN_ON(!list_empty(&td->fl_list));
188 return;
189 }
190
191 if (uhci->frame_cpu[td->frame] == td) {
192 if (list_empty(&td->fl_list)) {
193 uhci->frame[td->frame] = td->link;
194 uhci->frame_cpu[td->frame] = NULL;
195 } else {
196 struct uhci_td *ntd;
197
198 ntd = list_entry(td->fl_list.next,
199 struct uhci_td,
200 fl_list);
201 uhci->frame[td->frame] = LINK_TO_TD(uhci, ntd);
202 uhci->frame_cpu[td->frame] = ntd;
203 }
204 } else {
205 struct uhci_td *ptd;
206
207 ptd = list_entry(td->fl_list.prev, struct uhci_td, fl_list);
208 ptd->link = td->link;
209 }
210
211 list_del_init(&td->fl_list);
212 td->frame = -1;
213 }
214
215 static inline void uhci_remove_tds_from_frame(struct uhci_hcd *uhci,
216 unsigned int framenum)
217 {
218 struct uhci_td *ftd, *ltd;
219
220 framenum &= (UHCI_NUMFRAMES - 1);
221
222 ftd = uhci->frame_cpu[framenum];
223 if (ftd) {
224 ltd = list_entry(ftd->fl_list.prev, struct uhci_td, fl_list);
225 uhci->frame[framenum] = ltd->link;
226 uhci->frame_cpu[framenum] = NULL;
227
228 while (!list_empty(&ftd->fl_list))
229 list_del_init(ftd->fl_list.prev);
230 }
231 }
232
233
234
235
236 static void uhci_unlink_isochronous_tds(struct uhci_hcd *uhci, struct urb *urb)
237 {
238 struct urb_priv *urbp = (struct urb_priv *) urb->hcpriv;
239 struct uhci_td *td;
240
241 list_for_each_entry(td, &urbp->td_list, list)
242 uhci_remove_td_from_frame_list(uhci, td);
243 }
244
245 static struct uhci_qh *uhci_alloc_qh(struct uhci_hcd *uhci,
246 struct usb_device *udev, struct usb_host_endpoint *hep)
247 {
248 dma_addr_t dma_handle;
249 struct uhci_qh *qh;
250
251 qh = dma_pool_zalloc(uhci->qh_pool, GFP_ATOMIC, &dma_handle);
252 if (!qh)
253 return NULL;
254
255 qh->dma_handle = dma_handle;
256
257 qh->element = UHCI_PTR_TERM(uhci);
258 qh->link = UHCI_PTR_TERM(uhci);
259
260 INIT_LIST_HEAD(&qh->queue);
261 INIT_LIST_HEAD(&qh->node);
262
263 if (udev) {
264 qh->type = usb_endpoint_type(&hep->desc);
265 if (qh->type != USB_ENDPOINT_XFER_ISOC) {
266 qh->dummy_td = uhci_alloc_td(uhci);
267 if (!qh->dummy_td) {
268 dma_pool_free(uhci->qh_pool, qh, dma_handle);
269 return NULL;
270 }
271 }
272 qh->state = QH_STATE_IDLE;
273 qh->hep = hep;
274 qh->udev = udev;
275 hep->hcpriv = qh;
276
277 if (qh->type == USB_ENDPOINT_XFER_INT ||
278 qh->type == USB_ENDPOINT_XFER_ISOC)
279 qh->load = usb_calc_bus_time(udev->speed,
280 usb_endpoint_dir_in(&hep->desc),
281 qh->type == USB_ENDPOINT_XFER_ISOC,
282 usb_endpoint_maxp(&hep->desc))
283 / 1000 + 1;
284
285 } else {
286 qh->state = QH_STATE_ACTIVE;
287 qh->type = -1;
288 }
289 return qh;
290 }
291
292 static void uhci_free_qh(struct uhci_hcd *uhci, struct uhci_qh *qh)
293 {
294 WARN_ON(qh->state != QH_STATE_IDLE && qh->udev);
295 if (!list_empty(&qh->queue))
296 dev_WARN(uhci_dev(uhci), "qh %p list not empty!\n", qh);
297
298 list_del(&qh->node);
299 if (qh->udev) {
300 qh->hep->hcpriv = NULL;
301 if (qh->dummy_td)
302 uhci_free_td(uhci, qh->dummy_td);
303 }
304 dma_pool_free(uhci->qh_pool, qh, qh->dma_handle);
305 }
306
307
308
309
310
311
312
313
314 static int uhci_cleanup_queue(struct uhci_hcd *uhci, struct uhci_qh *qh,
315 struct urb *urb)
316 {
317 struct urb_priv *urbp = urb->hcpriv;
318 struct uhci_td *td;
319 int ret = 1;
320
321
322
323
324
325 if (qh->type == USB_ENDPOINT_XFER_ISOC) {
326 ret = (uhci->frame_number + uhci->is_stopped !=
327 qh->unlink_frame);
328 goto done;
329 }
330
331
332
333
334 if (qh->queue.next != &urbp->node) {
335 struct urb_priv *purbp;
336 struct uhci_td *ptd;
337
338 purbp = list_entry(urbp->node.prev, struct urb_priv, node);
339 WARN_ON(list_empty(&purbp->td_list));
340 ptd = list_entry(purbp->td_list.prev, struct uhci_td,
341 list);
342 td = list_entry(urbp->td_list.prev, struct uhci_td,
343 list);
344 ptd->link = td->link;
345 goto done;
346 }
347
348
349
350 if (qh_element(qh) == UHCI_PTR_TERM(uhci))
351 goto done;
352 qh->element = UHCI_PTR_TERM(uhci);
353
354
355 if (qh->type == USB_ENDPOINT_XFER_CONTROL)
356 goto done;
357
358
359 WARN_ON(list_empty(&urbp->td_list));
360 td = list_entry(urbp->td_list.next, struct uhci_td, list);
361 qh->needs_fixup = 1;
362 qh->initial_toggle = uhci_toggle(td_token(uhci, td));
363
364 done:
365 return ret;
366 }
367
368
369
370
371
372 static void uhci_fixup_toggles(struct uhci_hcd *uhci, struct uhci_qh *qh,
373 int skip_first)
374 {
375 struct urb_priv *urbp = NULL;
376 struct uhci_td *td;
377 unsigned int toggle = qh->initial_toggle;
378 unsigned int pipe;
379
380
381
382 if (skip_first)
383 urbp = list_entry(qh->queue.next, struct urb_priv, node);
384
385
386
387 else if (qh_element(qh) != UHCI_PTR_TERM(uhci))
388 toggle = 2;
389
390
391
392
393 urbp = list_prepare_entry(urbp, &qh->queue, node);
394 list_for_each_entry_continue(urbp, &qh->queue, node) {
395
396
397
398 td = list_entry(urbp->td_list.next, struct uhci_td, list);
399 if (toggle > 1 || uhci_toggle(td_token(uhci, td)) == toggle) {
400 td = list_entry(urbp->td_list.prev, struct uhci_td,
401 list);
402 toggle = uhci_toggle(td_token(uhci, td)) ^ 1;
403
404
405 } else {
406 list_for_each_entry(td, &urbp->td_list, list) {
407 td->token ^= cpu_to_hc32(uhci,
408 TD_TOKEN_TOGGLE);
409 toggle ^= 1;
410 }
411 }
412 }
413
414 wmb();
415 pipe = list_entry(qh->queue.next, struct urb_priv, node)->urb->pipe;
416 usb_settoggle(qh->udev, usb_pipeendpoint(pipe),
417 usb_pipeout(pipe), toggle);
418 qh->needs_fixup = 0;
419 }
420
421
422
423
424 static inline void link_iso(struct uhci_hcd *uhci, struct uhci_qh *qh)
425 {
426 list_add_tail(&qh->node, &uhci->skel_iso_qh->node);
427
428
429 }
430
431
432
433
434
435 static void link_interrupt(struct uhci_hcd *uhci, struct uhci_qh *qh)
436 {
437 struct uhci_qh *pqh;
438
439 list_add_tail(&qh->node, &uhci->skelqh[qh->skel]->node);
440
441 pqh = list_entry(qh->node.prev, struct uhci_qh, node);
442 qh->link = pqh->link;
443 wmb();
444 pqh->link = LINK_TO_QH(uhci, qh);
445 }
446
447
448
449
450
451 static void link_async(struct uhci_hcd *uhci, struct uhci_qh *qh)
452 {
453 struct uhci_qh *pqh;
454 __hc32 link_to_new_qh;
455
456
457
458
459 list_for_each_entry_reverse(pqh, &uhci->skel_async_qh->node, node) {
460 if (pqh->skel <= qh->skel)
461 break;
462 }
463 list_add(&qh->node, &pqh->node);
464
465
466 qh->link = pqh->link;
467 wmb();
468 link_to_new_qh = LINK_TO_QH(uhci, qh);
469 pqh->link = link_to_new_qh;
470
471
472
473 if (pqh->skel < SKEL_FSBR && qh->skel >= SKEL_FSBR)
474 uhci->skel_term_qh->link = link_to_new_qh;
475 }
476
477
478
479
480 static void uhci_activate_qh(struct uhci_hcd *uhci, struct uhci_qh *qh)
481 {
482 WARN_ON(list_empty(&qh->queue));
483
484
485
486 if (qh_element(qh) == UHCI_PTR_TERM(uhci)) {
487 struct urb_priv *urbp = list_entry(qh->queue.next,
488 struct urb_priv, node);
489 struct uhci_td *td = list_entry(urbp->td_list.next,
490 struct uhci_td, list);
491
492 qh->element = LINK_TO_TD(uhci, td);
493 }
494
495
496 qh->wait_expired = 0;
497 qh->advance_jiffies = jiffies;
498
499 if (qh->state == QH_STATE_ACTIVE)
500 return;
501 qh->state = QH_STATE_ACTIVE;
502
503
504
505 if (qh == uhci->next_qh)
506 uhci->next_qh = list_entry(qh->node.next, struct uhci_qh,
507 node);
508 list_del(&qh->node);
509
510 if (qh->skel == SKEL_ISO)
511 link_iso(uhci, qh);
512 else if (qh->skel < SKEL_ASYNC)
513 link_interrupt(uhci, qh);
514 else
515 link_async(uhci, qh);
516 }
517
518
519
520
521 static void unlink_interrupt(struct uhci_hcd *uhci, struct uhci_qh *qh)
522 {
523 struct uhci_qh *pqh;
524
525 pqh = list_entry(qh->node.prev, struct uhci_qh, node);
526 pqh->link = qh->link;
527 mb();
528 }
529
530
531
532
533 static void unlink_async(struct uhci_hcd *uhci, struct uhci_qh *qh)
534 {
535 struct uhci_qh *pqh;
536 __hc32 link_to_next_qh = qh->link;
537
538 pqh = list_entry(qh->node.prev, struct uhci_qh, node);
539 pqh->link = link_to_next_qh;
540
541
542
543 if (pqh->skel < SKEL_FSBR && qh->skel >= SKEL_FSBR)
544 uhci->skel_term_qh->link = link_to_next_qh;
545 mb();
546 }
547
548
549
550
551 static void uhci_unlink_qh(struct uhci_hcd *uhci, struct uhci_qh *qh)
552 {
553 if (qh->state == QH_STATE_UNLINKING)
554 return;
555 WARN_ON(qh->state != QH_STATE_ACTIVE || !qh->udev);
556 qh->state = QH_STATE_UNLINKING;
557
558
559 if (qh->skel == SKEL_ISO)
560 ;
561 else if (qh->skel < SKEL_ASYNC)
562 unlink_interrupt(uhci, qh);
563 else
564 unlink_async(uhci, qh);
565
566 uhci_get_current_frame_number(uhci);
567 qh->unlink_frame = uhci->frame_number;
568
569
570 if (list_empty(&uhci->skel_unlink_qh->node) || uhci->is_stopped)
571 uhci_set_next_interrupt(uhci);
572
573
574 if (qh == uhci->next_qh)
575 uhci->next_qh = list_entry(qh->node.next, struct uhci_qh,
576 node);
577 list_move_tail(&qh->node, &uhci->skel_unlink_qh->node);
578 }
579
580
581
582
583
584
585
586 static void uhci_make_qh_idle(struct uhci_hcd *uhci, struct uhci_qh *qh)
587 {
588 WARN_ON(qh->state == QH_STATE_ACTIVE);
589
590 if (qh == uhci->next_qh)
591 uhci->next_qh = list_entry(qh->node.next, struct uhci_qh,
592 node);
593 list_move(&qh->node, &uhci->idle_qh_list);
594 qh->state = QH_STATE_IDLE;
595
596
597 if (qh->post_td) {
598 uhci_free_td(uhci, qh->post_td);
599 qh->post_td = NULL;
600 }
601
602
603 if (uhci->num_waiting)
604 wake_up_all(&uhci->waitqh);
605 }
606
607
608
609
610 static int uhci_highest_load(struct uhci_hcd *uhci, int phase, int period)
611 {
612 int highest_load = uhci->load[phase];
613
614 for (phase += period; phase < MAX_PHASE; phase += period)
615 highest_load = max_t(int, highest_load, uhci->load[phase]);
616 return highest_load;
617 }
618
619
620
621
622
623 static int uhci_check_bandwidth(struct uhci_hcd *uhci, struct uhci_qh *qh)
624 {
625 int minimax_load;
626
627
628
629 if (qh->phase >= 0)
630 minimax_load = uhci_highest_load(uhci, qh->phase, qh->period);
631 else {
632 int phase, load;
633 int max_phase = min_t(int, MAX_PHASE, qh->period);
634
635 qh->phase = 0;
636 minimax_load = uhci_highest_load(uhci, qh->phase, qh->period);
637 for (phase = 1; phase < max_phase; ++phase) {
638 load = uhci_highest_load(uhci, phase, qh->period);
639 if (load < minimax_load) {
640 minimax_load = load;
641 qh->phase = phase;
642 }
643 }
644 }
645
646
647 if (minimax_load + qh->load > 900) {
648 dev_dbg(uhci_dev(uhci), "bandwidth allocation failed: "
649 "period %d, phase %d, %d + %d us\n",
650 qh->period, qh->phase, minimax_load, qh->load);
651 return -ENOSPC;
652 }
653 return 0;
654 }
655
656
657
658
659 static void uhci_reserve_bandwidth(struct uhci_hcd *uhci, struct uhci_qh *qh)
660 {
661 int i;
662 int load = qh->load;
663 char *p = "??";
664
665 for (i = qh->phase; i < MAX_PHASE; i += qh->period) {
666 uhci->load[i] += load;
667 uhci->total_load += load;
668 }
669 uhci_to_hcd(uhci)->self.bandwidth_allocated =
670 uhci->total_load / MAX_PHASE;
671 switch (qh->type) {
672 case USB_ENDPOINT_XFER_INT:
673 ++uhci_to_hcd(uhci)->self.bandwidth_int_reqs;
674 p = "INT";
675 break;
676 case USB_ENDPOINT_XFER_ISOC:
677 ++uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs;
678 p = "ISO";
679 break;
680 }
681 qh->bandwidth_reserved = 1;
682 dev_dbg(uhci_dev(uhci),
683 "%s dev %d ep%02x-%s, period %d, phase %d, %d us\n",
684 "reserve", qh->udev->devnum,
685 qh->hep->desc.bEndpointAddress, p,
686 qh->period, qh->phase, load);
687 }
688
689
690
691
692 static void uhci_release_bandwidth(struct uhci_hcd *uhci, struct uhci_qh *qh)
693 {
694 int i;
695 int load = qh->load;
696 char *p = "??";
697
698 for (i = qh->phase; i < MAX_PHASE; i += qh->period) {
699 uhci->load[i] -= load;
700 uhci->total_load -= load;
701 }
702 uhci_to_hcd(uhci)->self.bandwidth_allocated =
703 uhci->total_load / MAX_PHASE;
704 switch (qh->type) {
705 case USB_ENDPOINT_XFER_INT:
706 --uhci_to_hcd(uhci)->self.bandwidth_int_reqs;
707 p = "INT";
708 break;
709 case USB_ENDPOINT_XFER_ISOC:
710 --uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs;
711 p = "ISO";
712 break;
713 }
714 qh->bandwidth_reserved = 0;
715 dev_dbg(uhci_dev(uhci),
716 "%s dev %d ep%02x-%s, period %d, phase %d, %d us\n",
717 "release", qh->udev->devnum,
718 qh->hep->desc.bEndpointAddress, p,
719 qh->period, qh->phase, load);
720 }
721
722 static inline struct urb_priv *uhci_alloc_urb_priv(struct uhci_hcd *uhci,
723 struct urb *urb)
724 {
725 struct urb_priv *urbp;
726
727 urbp = kmem_cache_zalloc(uhci_up_cachep, GFP_ATOMIC);
728 if (!urbp)
729 return NULL;
730
731 urbp->urb = urb;
732 urb->hcpriv = urbp;
733
734 INIT_LIST_HEAD(&urbp->node);
735 INIT_LIST_HEAD(&urbp->td_list);
736
737 return urbp;
738 }
739
740 static void uhci_free_urb_priv(struct uhci_hcd *uhci,
741 struct urb_priv *urbp)
742 {
743 struct uhci_td *td, *tmp;
744
745 if (!list_empty(&urbp->node))
746 dev_WARN(uhci_dev(uhci), "urb %p still on QH's list!\n",
747 urbp->urb);
748
749 list_for_each_entry_safe(td, tmp, &urbp->td_list, list) {
750 uhci_remove_td_from_urbp(td);
751 uhci_free_td(uhci, td);
752 }
753
754 kmem_cache_free(uhci_up_cachep, urbp);
755 }
756
757
758
759
760
761
762
763
764
765 static int uhci_map_status(int status, int dir_out)
766 {
767 if (!status)
768 return 0;
769 if (status & TD_CTRL_BITSTUFF)
770 return -EPROTO;
771 if (status & TD_CTRL_CRCTIMEO) {
772 if (dir_out)
773 return -EPROTO;
774 else
775 return -EILSEQ;
776 }
777 if (status & TD_CTRL_BABBLE)
778 return -EOVERFLOW;
779 if (status & TD_CTRL_DBUFERR)
780 return -ENOSR;
781 if (status & TD_CTRL_STALLED)
782 return -EPIPE;
783 return 0;
784 }
785
786
787
788
789 static int uhci_submit_control(struct uhci_hcd *uhci, struct urb *urb,
790 struct uhci_qh *qh)
791 {
792 struct uhci_td *td;
793 unsigned long destination, status;
794 int maxsze = usb_endpoint_maxp(&qh->hep->desc);
795 int len = urb->transfer_buffer_length;
796 dma_addr_t data = urb->transfer_dma;
797 __hc32 *plink;
798 struct urb_priv *urbp = urb->hcpriv;
799 int skel;
800
801
802 destination = (urb->pipe & PIPE_DEVEP_MASK) | USB_PID_SETUP;
803
804
805 status = uhci_maxerr(3);
806 if (urb->dev->speed == USB_SPEED_LOW)
807 status |= TD_CTRL_LS;
808
809
810
811
812 td = qh->dummy_td;
813 uhci_add_td_to_urbp(td, urbp);
814 uhci_fill_td(uhci, td, status, destination | uhci_explen(8),
815 urb->setup_dma);
816 plink = &td->link;
817 status |= TD_CTRL_ACTIVE;
818
819
820
821
822
823
824
825
826 if (usb_pipeout(urb->pipe) || len == 0)
827 destination ^= (USB_PID_SETUP ^ USB_PID_OUT);
828 else {
829 destination ^= (USB_PID_SETUP ^ USB_PID_IN);
830 status |= TD_CTRL_SPD;
831 }
832
833
834
835
836 while (len > 0) {
837 int pktsze = maxsze;
838
839 if (len <= pktsze) {
840 pktsze = len;
841 status &= ~TD_CTRL_SPD;
842 }
843
844 td = uhci_alloc_td(uhci);
845 if (!td)
846 goto nomem;
847 *plink = LINK_TO_TD(uhci, td);
848
849
850 destination ^= TD_TOKEN_TOGGLE;
851
852 uhci_add_td_to_urbp(td, urbp);
853 uhci_fill_td(uhci, td, status,
854 destination | uhci_explen(pktsze), data);
855 plink = &td->link;
856
857 data += pktsze;
858 len -= pktsze;
859 }
860
861
862
863
864 td = uhci_alloc_td(uhci);
865 if (!td)
866 goto nomem;
867 *plink = LINK_TO_TD(uhci, td);
868
869
870 destination ^= (USB_PID_IN ^ USB_PID_OUT);
871 destination |= TD_TOKEN_TOGGLE;
872
873 uhci_add_td_to_urbp(td, urbp);
874 uhci_fill_td(uhci, td, status | TD_CTRL_IOC,
875 destination | uhci_explen(0), 0);
876 plink = &td->link;
877
878
879
880
881 td = uhci_alloc_td(uhci);
882 if (!td)
883 goto nomem;
884 *plink = LINK_TO_TD(uhci, td);
885
886 uhci_fill_td(uhci, td, 0, USB_PID_OUT | uhci_explen(0), 0);
887 wmb();
888 qh->dummy_td->status |= cpu_to_hc32(uhci, TD_CTRL_ACTIVE);
889 qh->dummy_td = td;
890
891
892
893
894
895 if (urb->dev->speed == USB_SPEED_LOW ||
896 urb->dev->state != USB_STATE_CONFIGURED)
897 skel = SKEL_LS_CONTROL;
898 else {
899 skel = SKEL_FS_CONTROL;
900 uhci_add_fsbr(uhci, urb);
901 }
902 if (qh->state != QH_STATE_ACTIVE)
903 qh->skel = skel;
904 return 0;
905
906 nomem:
907
908 uhci_remove_td_from_urbp(qh->dummy_td);
909 return -ENOMEM;
910 }
911
912
913
914
915 static int uhci_submit_common(struct uhci_hcd *uhci, struct urb *urb,
916 struct uhci_qh *qh)
917 {
918 struct uhci_td *td;
919 unsigned long destination, status;
920 int maxsze = usb_endpoint_maxp(&qh->hep->desc);
921 int len = urb->transfer_buffer_length;
922 int this_sg_len;
923 dma_addr_t data;
924 __hc32 *plink;
925 struct urb_priv *urbp = urb->hcpriv;
926 unsigned int toggle;
927 struct scatterlist *sg;
928 int i;
929
930 if (len < 0)
931 return -EINVAL;
932
933
934 destination = (urb->pipe & PIPE_DEVEP_MASK) | usb_packetid(urb->pipe);
935 toggle = usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
936 usb_pipeout(urb->pipe));
937
938
939 status = uhci_maxerr(3);
940 if (urb->dev->speed == USB_SPEED_LOW)
941 status |= TD_CTRL_LS;
942 if (usb_pipein(urb->pipe))
943 status |= TD_CTRL_SPD;
944
945 i = urb->num_mapped_sgs;
946 if (len > 0 && i > 0) {
947 sg = urb->sg;
948 data = sg_dma_address(sg);
949
950
951
952
953 this_sg_len = min_t(int, sg_dma_len(sg), len);
954 } else {
955 sg = NULL;
956 data = urb->transfer_dma;
957 this_sg_len = len;
958 }
959
960
961
962 plink = NULL;
963 td = qh->dummy_td;
964 for (;;) {
965 int pktsze = maxsze;
966
967 if (len <= pktsze) {
968 pktsze = len;
969 if (!(urb->transfer_flags & URB_SHORT_NOT_OK))
970 status &= ~TD_CTRL_SPD;
971 }
972
973 if (plink) {
974 td = uhci_alloc_td(uhci);
975 if (!td)
976 goto nomem;
977 *plink = LINK_TO_TD(uhci, td);
978 }
979 uhci_add_td_to_urbp(td, urbp);
980 uhci_fill_td(uhci, td, status,
981 destination | uhci_explen(pktsze) |
982 (toggle << TD_TOKEN_TOGGLE_SHIFT),
983 data);
984 plink = &td->link;
985 status |= TD_CTRL_ACTIVE;
986
987 toggle ^= 1;
988 data += pktsze;
989 this_sg_len -= pktsze;
990 len -= maxsze;
991 if (this_sg_len <= 0) {
992 if (--i <= 0 || len <= 0)
993 break;
994 sg = sg_next(sg);
995 data = sg_dma_address(sg);
996 this_sg_len = min_t(int, sg_dma_len(sg), len);
997 }
998 }
999
1000
1001
1002
1003
1004
1005
1006
1007 if ((urb->transfer_flags & URB_ZERO_PACKET) &&
1008 usb_pipeout(urb->pipe) && len == 0 &&
1009 urb->transfer_buffer_length > 0) {
1010 td = uhci_alloc_td(uhci);
1011 if (!td)
1012 goto nomem;
1013 *plink = LINK_TO_TD(uhci, td);
1014
1015 uhci_add_td_to_urbp(td, urbp);
1016 uhci_fill_td(uhci, td, status,
1017 destination | uhci_explen(0) |
1018 (toggle << TD_TOKEN_TOGGLE_SHIFT),
1019 data);
1020 plink = &td->link;
1021
1022 toggle ^= 1;
1023 }
1024
1025
1026
1027
1028
1029
1030
1031 td->status |= cpu_to_hc32(uhci, TD_CTRL_IOC);
1032
1033
1034
1035
1036 td = uhci_alloc_td(uhci);
1037 if (!td)
1038 goto nomem;
1039 *plink = LINK_TO_TD(uhci, td);
1040
1041 uhci_fill_td(uhci, td, 0, USB_PID_OUT | uhci_explen(0), 0);
1042 wmb();
1043 qh->dummy_td->status |= cpu_to_hc32(uhci, TD_CTRL_ACTIVE);
1044 qh->dummy_td = td;
1045
1046 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
1047 usb_pipeout(urb->pipe), toggle);
1048 return 0;
1049
1050 nomem:
1051
1052 uhci_remove_td_from_urbp(qh->dummy_td);
1053 return -ENOMEM;
1054 }
1055
1056 static int uhci_submit_bulk(struct uhci_hcd *uhci, struct urb *urb,
1057 struct uhci_qh *qh)
1058 {
1059 int ret;
1060
1061
1062 if (urb->dev->speed == USB_SPEED_LOW)
1063 return -EINVAL;
1064
1065 if (qh->state != QH_STATE_ACTIVE)
1066 qh->skel = SKEL_BULK;
1067 ret = uhci_submit_common(uhci, urb, qh);
1068 if (ret == 0)
1069 uhci_add_fsbr(uhci, urb);
1070 return ret;
1071 }
1072
1073 static int uhci_submit_interrupt(struct uhci_hcd *uhci, struct urb *urb,
1074 struct uhci_qh *qh)
1075 {
1076 int ret;
1077
1078
1079
1080
1081
1082
1083 if (!qh->bandwidth_reserved) {
1084 int exponent;
1085
1086
1087 for (exponent = 7; exponent >= 0; --exponent) {
1088 if ((1 << exponent) <= urb->interval)
1089 break;
1090 }
1091 if (exponent < 0)
1092 return -EINVAL;
1093
1094
1095 do {
1096 qh->period = 1 << exponent;
1097 qh->skel = SKEL_INDEX(exponent);
1098
1099
1100
1101
1102 qh->phase = (qh->period / 2) & (MAX_PHASE - 1);
1103 ret = uhci_check_bandwidth(uhci, qh);
1104 } while (ret != 0 && --exponent >= 0);
1105 if (ret)
1106 return ret;
1107 } else if (qh->period > urb->interval)
1108 return -EINVAL;
1109
1110 ret = uhci_submit_common(uhci, urb, qh);
1111 if (ret == 0) {
1112 urb->interval = qh->period;
1113 if (!qh->bandwidth_reserved)
1114 uhci_reserve_bandwidth(uhci, qh);
1115 }
1116 return ret;
1117 }
1118
1119
1120
1121
1122 static int uhci_fixup_short_transfer(struct uhci_hcd *uhci,
1123 struct uhci_qh *qh, struct urb_priv *urbp)
1124 {
1125 struct uhci_td *td;
1126 struct list_head *tmp;
1127 int ret;
1128
1129 td = list_entry(urbp->td_list.prev, struct uhci_td, list);
1130 if (qh->type == USB_ENDPOINT_XFER_CONTROL) {
1131
1132
1133
1134
1135 WARN_ON(list_empty(&urbp->td_list));
1136 qh->element = LINK_TO_TD(uhci, td);
1137 tmp = td->list.prev;
1138 ret = -EINPROGRESS;
1139
1140 } else {
1141
1142
1143
1144
1145 qh->initial_toggle =
1146 uhci_toggle(td_token(uhci, qh->post_td)) ^ 1;
1147 uhci_fixup_toggles(uhci, qh, 1);
1148
1149 if (list_empty(&urbp->td_list))
1150 td = qh->post_td;
1151 qh->element = td->link;
1152 tmp = urbp->td_list.prev;
1153 ret = 0;
1154 }
1155
1156
1157 while (tmp != &urbp->td_list) {
1158 td = list_entry(tmp, struct uhci_td, list);
1159 tmp = tmp->prev;
1160
1161 uhci_remove_td_from_urbp(td);
1162 uhci_free_td(uhci, td);
1163 }
1164 return ret;
1165 }
1166
1167
1168
1169
1170 static int uhci_result_common(struct uhci_hcd *uhci, struct urb *urb)
1171 {
1172 struct urb_priv *urbp = urb->hcpriv;
1173 struct uhci_qh *qh = urbp->qh;
1174 struct uhci_td *td, *tmp;
1175 unsigned status;
1176 int ret = 0;
1177
1178 list_for_each_entry_safe(td, tmp, &urbp->td_list, list) {
1179 unsigned int ctrlstat;
1180 int len;
1181
1182 ctrlstat = td_status(uhci, td);
1183 status = uhci_status_bits(ctrlstat);
1184 if (status & TD_CTRL_ACTIVE)
1185 return -EINPROGRESS;
1186
1187 len = uhci_actual_length(ctrlstat);
1188 urb->actual_length += len;
1189
1190 if (status) {
1191 ret = uhci_map_status(status,
1192 uhci_packetout(td_token(uhci, td)));
1193 if ((debug == 1 && ret != -EPIPE) || debug > 1) {
1194
1195 dev_dbg(&urb->dev->dev,
1196 "%s: failed with status %x\n",
1197 __func__, status);
1198
1199 if (debug > 1 && errbuf) {
1200
1201 uhci_show_qh(uhci, urbp->qh, errbuf,
1202 ERRBUF_LEN - EXTRA_SPACE, 0);
1203 lprintk(errbuf);
1204 }
1205 }
1206
1207
1208 } else if (len < uhci_expected_length(td_token(uhci, td))) {
1209
1210
1211
1212 if (qh->type == USB_ENDPOINT_XFER_CONTROL) {
1213 if (td->list.next != urbp->td_list.prev)
1214 ret = 1;
1215 }
1216
1217
1218 else if (urb->transfer_flags & URB_SHORT_NOT_OK)
1219 ret = -EREMOTEIO;
1220
1221
1222 else if (&td->list != urbp->td_list.prev)
1223 ret = 1;
1224 }
1225
1226 uhci_remove_td_from_urbp(td);
1227 if (qh->post_td)
1228 uhci_free_td(uhci, qh->post_td);
1229 qh->post_td = td;
1230
1231 if (ret != 0)
1232 goto err;
1233 }
1234 return ret;
1235
1236 err:
1237 if (ret < 0) {
1238
1239
1240 qh->element = UHCI_PTR_TERM(uhci);
1241 qh->is_stopped = 1;
1242 qh->needs_fixup = (qh->type != USB_ENDPOINT_XFER_CONTROL);
1243 qh->initial_toggle = uhci_toggle(td_token(uhci, td)) ^
1244 (ret == -EREMOTEIO);
1245
1246 } else
1247 ret = uhci_fixup_short_transfer(uhci, qh, urbp);
1248 return ret;
1249 }
1250
1251
1252
1253
1254 static int uhci_submit_isochronous(struct uhci_hcd *uhci, struct urb *urb,
1255 struct uhci_qh *qh)
1256 {
1257 struct uhci_td *td = NULL;
1258 int i;
1259 unsigned frame, next;
1260 unsigned long destination, status;
1261 struct urb_priv *urbp = (struct urb_priv *) urb->hcpriv;
1262
1263
1264 if (urb->interval >= UHCI_NUMFRAMES ||
1265 urb->number_of_packets >= UHCI_NUMFRAMES)
1266 return -EFBIG;
1267
1268 uhci_get_current_frame_number(uhci);
1269
1270
1271 if (!qh->bandwidth_reserved) {
1272 qh->period = urb->interval;
1273 qh->phase = -1;
1274 i = uhci_check_bandwidth(uhci, qh);
1275 if (i)
1276 return i;
1277
1278
1279 next = uhci->frame_number + 10;
1280 frame = qh->phase;
1281
1282
1283 frame += (next - frame + qh->period - 1) & -qh->period;
1284
1285 } else if (qh->period != urb->interval) {
1286 return -EINVAL;
1287
1288 } else {
1289 next = uhci->frame_number + 1;
1290
1291
1292 if (list_empty(&qh->queue)) {
1293 frame = qh->iso_frame;
1294 } else {
1295 struct urb *lurb;
1296
1297 lurb = list_entry(qh->queue.prev,
1298 struct urb_priv, node)->urb;
1299 frame = lurb->start_frame +
1300 lurb->number_of_packets *
1301 lurb->interval;
1302 }
1303
1304
1305 if (!uhci_frame_before_eq(next, frame)) {
1306
1307
1308 if (urb->transfer_flags & URB_ISO_ASAP)
1309 frame += (next - frame + qh->period - 1) &
1310 -qh->period;
1311
1312
1313
1314
1315
1316 else if (!uhci_frame_before_eq(next,
1317 frame + (urb->number_of_packets - 1) *
1318 qh->period))
1319 dev_dbg(uhci_dev(uhci), "iso underrun %p (%u+%u < %u)\n",
1320 urb, frame,
1321 (urb->number_of_packets - 1) *
1322 qh->period,
1323 next);
1324 }
1325 }
1326
1327
1328 if (uhci_frame_before_eq(uhci->last_iso_frame + UHCI_NUMFRAMES,
1329 frame + urb->number_of_packets * urb->interval))
1330 return -EFBIG;
1331 urb->start_frame = frame;
1332
1333 status = TD_CTRL_ACTIVE | TD_CTRL_IOS;
1334 destination = (urb->pipe & PIPE_DEVEP_MASK) | usb_packetid(urb->pipe);
1335
1336 for (i = 0; i < urb->number_of_packets; i++) {
1337 td = uhci_alloc_td(uhci);
1338 if (!td)
1339 return -ENOMEM;
1340
1341 uhci_add_td_to_urbp(td, urbp);
1342 uhci_fill_td(uhci, td, status, destination |
1343 uhci_explen(urb->iso_frame_desc[i].length),
1344 urb->transfer_dma +
1345 urb->iso_frame_desc[i].offset);
1346 }
1347
1348
1349 td->status |= cpu_to_hc32(uhci, TD_CTRL_IOC);
1350
1351
1352 frame = urb->start_frame;
1353 list_for_each_entry(td, &urbp->td_list, list) {
1354 uhci_insert_td_in_frame_list(uhci, td, frame);
1355 frame += qh->period;
1356 }
1357
1358 if (list_empty(&qh->queue)) {
1359 qh->iso_packet_desc = &urb->iso_frame_desc[0];
1360 qh->iso_frame = urb->start_frame;
1361 }
1362
1363 qh->skel = SKEL_ISO;
1364 if (!qh->bandwidth_reserved)
1365 uhci_reserve_bandwidth(uhci, qh);
1366 return 0;
1367 }
1368
1369 static int uhci_result_isochronous(struct uhci_hcd *uhci, struct urb *urb)
1370 {
1371 struct uhci_td *td, *tmp;
1372 struct urb_priv *urbp = urb->hcpriv;
1373 struct uhci_qh *qh = urbp->qh;
1374
1375 list_for_each_entry_safe(td, tmp, &urbp->td_list, list) {
1376 unsigned int ctrlstat;
1377 int status;
1378 int actlength;
1379
1380 if (uhci_frame_before_eq(uhci->cur_iso_frame, qh->iso_frame))
1381 return -EINPROGRESS;
1382
1383 uhci_remove_tds_from_frame(uhci, qh->iso_frame);
1384
1385 ctrlstat = td_status(uhci, td);
1386 if (ctrlstat & TD_CTRL_ACTIVE) {
1387 status = -EXDEV;
1388 } else {
1389 status = uhci_map_status(uhci_status_bits(ctrlstat),
1390 usb_pipeout(urb->pipe));
1391 actlength = uhci_actual_length(ctrlstat);
1392
1393 urb->actual_length += actlength;
1394 qh->iso_packet_desc->actual_length = actlength;
1395 qh->iso_packet_desc->status = status;
1396 }
1397 if (status)
1398 urb->error_count++;
1399
1400 uhci_remove_td_from_urbp(td);
1401 uhci_free_td(uhci, td);
1402 qh->iso_frame += qh->period;
1403 ++qh->iso_packet_desc;
1404 }
1405 return 0;
1406 }
1407
1408 static int uhci_urb_enqueue(struct usb_hcd *hcd,
1409 struct urb *urb, gfp_t mem_flags)
1410 {
1411 int ret;
1412 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
1413 unsigned long flags;
1414 struct urb_priv *urbp;
1415 struct uhci_qh *qh;
1416
1417 spin_lock_irqsave(&uhci->lock, flags);
1418
1419 ret = usb_hcd_link_urb_to_ep(hcd, urb);
1420 if (ret)
1421 goto done_not_linked;
1422
1423 ret = -ENOMEM;
1424 urbp = uhci_alloc_urb_priv(uhci, urb);
1425 if (!urbp)
1426 goto done;
1427
1428 if (urb->ep->hcpriv)
1429 qh = urb->ep->hcpriv;
1430 else {
1431 qh = uhci_alloc_qh(uhci, urb->dev, urb->ep);
1432 if (!qh)
1433 goto err_no_qh;
1434 }
1435 urbp->qh = qh;
1436
1437 switch (qh->type) {
1438 case USB_ENDPOINT_XFER_CONTROL:
1439 ret = uhci_submit_control(uhci, urb, qh);
1440 break;
1441 case USB_ENDPOINT_XFER_BULK:
1442 ret = uhci_submit_bulk(uhci, urb, qh);
1443 break;
1444 case USB_ENDPOINT_XFER_INT:
1445 ret = uhci_submit_interrupt(uhci, urb, qh);
1446 break;
1447 case USB_ENDPOINT_XFER_ISOC:
1448 urb->error_count = 0;
1449 ret = uhci_submit_isochronous(uhci, urb, qh);
1450 break;
1451 }
1452 if (ret != 0)
1453 goto err_submit_failed;
1454
1455
1456 list_add_tail(&urbp->node, &qh->queue);
1457
1458
1459
1460
1461
1462 if (qh->queue.next == &urbp->node && !qh->is_stopped) {
1463 uhci_activate_qh(uhci, qh);
1464 uhci_urbp_wants_fsbr(uhci, urbp);
1465 }
1466 goto done;
1467
1468 err_submit_failed:
1469 if (qh->state == QH_STATE_IDLE)
1470 uhci_make_qh_idle(uhci, qh);
1471 err_no_qh:
1472 uhci_free_urb_priv(uhci, urbp);
1473 done:
1474 if (ret)
1475 usb_hcd_unlink_urb_from_ep(hcd, urb);
1476 done_not_linked:
1477 spin_unlock_irqrestore(&uhci->lock, flags);
1478 return ret;
1479 }
1480
1481 static int uhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1482 {
1483 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
1484 unsigned long flags;
1485 struct uhci_qh *qh;
1486 int rc;
1487
1488 spin_lock_irqsave(&uhci->lock, flags);
1489 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1490 if (rc)
1491 goto done;
1492
1493 qh = ((struct urb_priv *) urb->hcpriv)->qh;
1494
1495
1496 if (qh->type == USB_ENDPOINT_XFER_ISOC) {
1497 uhci_unlink_isochronous_tds(uhci, urb);
1498 mb();
1499
1500
1501 uhci_get_current_frame_number(uhci);
1502 if (uhci_frame_before_eq(urb->start_frame, uhci->frame_number))
1503 qh->unlink_frame = uhci->frame_number;
1504 }
1505
1506 uhci_unlink_qh(uhci, qh);
1507
1508 done:
1509 spin_unlock_irqrestore(&uhci->lock, flags);
1510 return rc;
1511 }
1512
1513
1514
1515
1516 static void uhci_giveback_urb(struct uhci_hcd *uhci, struct uhci_qh *qh,
1517 struct urb *urb, int status)
1518 __releases(uhci->lock)
1519 __acquires(uhci->lock)
1520 {
1521 struct urb_priv *urbp = (struct urb_priv *) urb->hcpriv;
1522
1523 if (qh->type == USB_ENDPOINT_XFER_CONTROL) {
1524
1525
1526
1527
1528 urb->actual_length -= min_t(u32, 8, urb->actual_length);
1529 }
1530
1531
1532
1533 else if (qh->type == USB_ENDPOINT_XFER_ISOC &&
1534 urbp->node.prev == &qh->queue &&
1535 urbp->node.next != &qh->queue) {
1536 struct urb *nurb = list_entry(urbp->node.next,
1537 struct urb_priv, node)->urb;
1538
1539 qh->iso_packet_desc = &nurb->iso_frame_desc[0];
1540 qh->iso_frame = nurb->start_frame;
1541 }
1542
1543
1544
1545 list_del_init(&urbp->node);
1546 if (list_empty(&qh->queue) && qh->needs_fixup) {
1547 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
1548 usb_pipeout(urb->pipe), qh->initial_toggle);
1549 qh->needs_fixup = 0;
1550 }
1551
1552 uhci_free_urb_priv(uhci, urbp);
1553 usb_hcd_unlink_urb_from_ep(uhci_to_hcd(uhci), urb);
1554
1555 spin_unlock(&uhci->lock);
1556 usb_hcd_giveback_urb(uhci_to_hcd(uhci), urb, status);
1557 spin_lock(&uhci->lock);
1558
1559
1560
1561 if (list_empty(&qh->queue)) {
1562 uhci_unlink_qh(uhci, qh);
1563 if (qh->bandwidth_reserved)
1564 uhci_release_bandwidth(uhci, qh);
1565 }
1566 }
1567
1568
1569
1570
1571 #define QH_FINISHED_UNLINKING(qh) \
1572 (qh->state == QH_STATE_UNLINKING && \
1573 uhci->frame_number + uhci->is_stopped != qh->unlink_frame)
1574
1575 static void uhci_scan_qh(struct uhci_hcd *uhci, struct uhci_qh *qh)
1576 {
1577 struct urb_priv *urbp;
1578 struct urb *urb;
1579 int status;
1580
1581 while (!list_empty(&qh->queue)) {
1582 urbp = list_entry(qh->queue.next, struct urb_priv, node);
1583 urb = urbp->urb;
1584
1585 if (qh->type == USB_ENDPOINT_XFER_ISOC)
1586 status = uhci_result_isochronous(uhci, urb);
1587 else
1588 status = uhci_result_common(uhci, urb);
1589 if (status == -EINPROGRESS)
1590 break;
1591
1592
1593
1594 if (urb->unlinked) {
1595 if (QH_FINISHED_UNLINKING(qh))
1596 qh->is_stopped = 1;
1597 else if (!qh->is_stopped)
1598 return;
1599 }
1600
1601 uhci_giveback_urb(uhci, qh, urb, status);
1602 if (status < 0)
1603 break;
1604 }
1605
1606
1607
1608 if (QH_FINISHED_UNLINKING(qh))
1609 qh->is_stopped = 1;
1610 else if (!qh->is_stopped)
1611 return;
1612
1613
1614 restart:
1615 list_for_each_entry(urbp, &qh->queue, node) {
1616 urb = urbp->urb;
1617 if (urb->unlinked) {
1618
1619
1620
1621
1622 if (!uhci_cleanup_queue(uhci, qh, urb)) {
1623 qh->is_stopped = 0;
1624 return;
1625 }
1626 uhci_giveback_urb(uhci, qh, urb, 0);
1627 goto restart;
1628 }
1629 }
1630 qh->is_stopped = 0;
1631
1632
1633
1634 if (!list_empty(&qh->queue)) {
1635 if (qh->needs_fixup)
1636 uhci_fixup_toggles(uhci, qh, 0);
1637
1638
1639
1640
1641 urbp = list_entry(qh->queue.next, struct urb_priv, node);
1642 if (urbp->fsbr && qh->wait_expired) {
1643 struct uhci_td *td = list_entry(urbp->td_list.next,
1644 struct uhci_td, list);
1645
1646 td->status |= cpu_to_hc32(uhci, TD_CTRL_IOC);
1647 }
1648
1649 uhci_activate_qh(uhci, qh);
1650 }
1651
1652
1653
1654 else if (QH_FINISHED_UNLINKING(qh))
1655 uhci_make_qh_idle(uhci, qh);
1656 }
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668 static int uhci_advance_check(struct uhci_hcd *uhci, struct uhci_qh *qh)
1669 {
1670 struct urb_priv *urbp = NULL;
1671 struct uhci_td *td;
1672 int ret = 1;
1673 unsigned status;
1674
1675 if (qh->type == USB_ENDPOINT_XFER_ISOC)
1676 goto done;
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686 if (qh->state != QH_STATE_ACTIVE) {
1687 urbp = NULL;
1688 status = 0;
1689
1690 } else {
1691 urbp = list_entry(qh->queue.next, struct urb_priv, node);
1692 td = list_entry(urbp->td_list.next, struct uhci_td, list);
1693 status = td_status(uhci, td);
1694 if (!(status & TD_CTRL_ACTIVE)) {
1695
1696
1697 qh->wait_expired = 0;
1698 qh->advance_jiffies = jiffies;
1699 goto done;
1700 }
1701 ret = uhci->is_stopped;
1702 }
1703
1704
1705 if (qh->wait_expired)
1706 goto done;
1707
1708 if (time_after(jiffies, qh->advance_jiffies + QH_WAIT_TIMEOUT)) {
1709
1710
1711 if (qh->post_td && qh_element(qh) ==
1712 LINK_TO_TD(uhci, qh->post_td)) {
1713 qh->element = qh->post_td->link;
1714 qh->advance_jiffies = jiffies;
1715 ret = 1;
1716 goto done;
1717 }
1718
1719 qh->wait_expired = 1;
1720
1721
1722
1723
1724
1725 if (urbp && urbp->fsbr && !(status & TD_CTRL_IOC))
1726 uhci_unlink_qh(uhci, qh);
1727
1728 } else {
1729
1730 if (urbp)
1731 uhci_urbp_wants_fsbr(uhci, urbp);
1732 }
1733
1734 done:
1735 return ret;
1736 }
1737
1738
1739
1740
1741 static void uhci_scan_schedule(struct uhci_hcd *uhci)
1742 {
1743 int i;
1744 struct uhci_qh *qh;
1745
1746
1747 if (uhci->scan_in_progress) {
1748 uhci->need_rescan = 1;
1749 return;
1750 }
1751 uhci->scan_in_progress = 1;
1752 rescan:
1753 uhci->need_rescan = 0;
1754 uhci->fsbr_is_wanted = 0;
1755
1756 uhci_clear_next_interrupt(uhci);
1757 uhci_get_current_frame_number(uhci);
1758 uhci->cur_iso_frame = uhci->frame_number;
1759
1760
1761 for (i = 0; i < UHCI_NUM_SKELQH - 1; ++i) {
1762 uhci->next_qh = list_entry(uhci->skelqh[i]->node.next,
1763 struct uhci_qh, node);
1764 while ((qh = uhci->next_qh) != uhci->skelqh[i]) {
1765 uhci->next_qh = list_entry(qh->node.next,
1766 struct uhci_qh, node);
1767
1768 if (uhci_advance_check(uhci, qh)) {
1769 uhci_scan_qh(uhci, qh);
1770 if (qh->state == QH_STATE_ACTIVE) {
1771 uhci_urbp_wants_fsbr(uhci,
1772 list_entry(qh->queue.next, struct urb_priv, node));
1773 }
1774 }
1775 }
1776 }
1777
1778 uhci->last_iso_frame = uhci->cur_iso_frame;
1779 if (uhci->need_rescan)
1780 goto rescan;
1781 uhci->scan_in_progress = 0;
1782
1783 if (uhci->fsbr_is_on && !uhci->fsbr_is_wanted &&
1784 !uhci->fsbr_expiring) {
1785 uhci->fsbr_expiring = 1;
1786 mod_timer(&uhci->fsbr_timer, jiffies + FSBR_OFF_DELAY);
1787 }
1788
1789 if (list_empty(&uhci->skel_unlink_qh->node))
1790 uhci_clear_next_interrupt(uhci);
1791 else
1792 uhci_set_next_interrupt(uhci);
1793 }