1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32static int
33qtd_fill(struct ehci_hcd *ehci, struct ehci_qtd *qtd, dma_addr_t buf,
34 size_t len, int token, int maxpacket)
35{
36 int i, count;
37 u64 addr = buf;
38
39
40 qtd->hw_buf[0] = cpu_to_hc32(ehci, (u32)addr);
41 qtd->hw_buf_hi[0] = cpu_to_hc32(ehci, (u32)(addr >> 32));
42 count = 0x1000 - (buf & 0x0fff);
43 if (likely (len < count))
44 count = len;
45 else {
46 buf += 0x1000;
47 buf &= ~0x0fff;
48
49
50 for (i = 1; count < len && i < 5; i++) {
51 addr = buf;
52 qtd->hw_buf[i] = cpu_to_hc32(ehci, (u32)addr);
53 qtd->hw_buf_hi[i] = cpu_to_hc32(ehci,
54 (u32)(addr >> 32));
55 buf += 0x1000;
56 if ((count + 0x1000) < len)
57 count += 0x1000;
58 else
59 count = len;
60 }
61
62
63 if (count != len)
64 count -= (count % maxpacket);
65 }
66 qtd->hw_token = cpu_to_hc32(ehci, (count << 16) | token);
67 qtd->length = count;
68
69 return count;
70}
71
72
73
74static inline void
75qh_update (struct ehci_hcd *ehci, struct ehci_qh *qh, struct ehci_qtd *qtd)
76{
77 struct ehci_qh_hw *hw = qh->hw;
78
79
80 WARN_ON(qh->qh_state != QH_STATE_IDLE);
81
82 hw->hw_qtd_next = QTD_NEXT(ehci, qtd->qtd_dma);
83 hw->hw_alt_next = EHCI_LIST_END(ehci);
84
85
86
87
88
89
90 if (!(hw->hw_info1 & cpu_to_hc32(ehci, QH_TOGGLE_CTL))) {
91 unsigned is_out, epnum;
92
93 is_out = qh->is_out;
94 epnum = (hc32_to_cpup(ehci, &hw->hw_info1) >> 8) & 0x0f;
95 if (unlikely(!usb_gettoggle(qh->ps.udev, epnum, is_out))) {
96 hw->hw_token &= ~cpu_to_hc32(ehci, QTD_TOGGLE);
97 usb_settoggle(qh->ps.udev, epnum, is_out, 1);
98 }
99 }
100
101 hw->hw_token &= cpu_to_hc32(ehci, QTD_TOGGLE | QTD_STS_PING);
102}
103
104
105
106
107
108static void
109qh_refresh (struct ehci_hcd *ehci, struct ehci_qh *qh)
110{
111 struct ehci_qtd *qtd;
112
113 qtd = list_entry(qh->qtd_list.next, struct ehci_qtd, qtd_list);
114
115
116
117
118
119
120
121
122 if (qh->hw->hw_token & ACTIVE_BIT(ehci)) {
123 qh->hw->hw_qtd_next = qtd->hw_next;
124 if (qh->should_be_inactive)
125 ehci_warn(ehci, "qh %p should be inactive!\n", qh);
126 } else {
127 qh_update(ehci, qh, qtd);
128 }
129 qh->should_be_inactive = 0;
130}
131
132
133
134static void qh_link_async(struct ehci_hcd *ehci, struct ehci_qh *qh);
135
136static void ehci_clear_tt_buffer_complete(struct usb_hcd *hcd,
137 struct usb_host_endpoint *ep)
138{
139 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
140 struct ehci_qh *qh = ep->hcpriv;
141 unsigned long flags;
142
143 spin_lock_irqsave(&ehci->lock, flags);
144 qh->clearing_tt = 0;
145 if (qh->qh_state == QH_STATE_IDLE && !list_empty(&qh->qtd_list)
146 && ehci->rh_state == EHCI_RH_RUNNING)
147 qh_link_async(ehci, qh);
148 spin_unlock_irqrestore(&ehci->lock, flags);
149}
150
151static void ehci_clear_tt_buffer(struct ehci_hcd *ehci, struct ehci_qh *qh,
152 struct urb *urb, u32 token)
153{
154
155
156
157
158
159
160
161 if (urb->dev->tt && !usb_pipeint(urb->pipe) && !qh->clearing_tt) {
162#ifdef CONFIG_DYNAMIC_DEBUG
163 struct usb_device *tt = urb->dev->tt->hub;
164 dev_dbg(&tt->dev,
165 "clear tt buffer port %d, a%d ep%d t%08x\n",
166 urb->dev->ttport, urb->dev->devnum,
167 usb_pipeendpoint(urb->pipe), token);
168#endif
169 if (!ehci_is_TDI(ehci)
170 || urb->dev->tt->hub !=
171 ehci_to_hcd(ehci)->self.root_hub) {
172 if (usb_hub_clear_tt_buffer(urb) == 0)
173 qh->clearing_tt = 1;
174 } else {
175
176
177
178
179 }
180 }
181}
182
183static int qtd_copy_status (
184 struct ehci_hcd *ehci,
185 struct urb *urb,
186 size_t length,
187 u32 token
188)
189{
190 int status = -EINPROGRESS;
191
192
193 if (likely (QTD_PID (token) != 2))
194 urb->actual_length += length - QTD_LENGTH (token);
195
196
197 if (unlikely(urb->unlinked))
198 return status;
199
200
201 if (unlikely (IS_SHORT_READ (token)))
202 status = -EREMOTEIO;
203
204
205 if (token & QTD_STS_HALT) {
206 if (token & QTD_STS_BABBLE) {
207
208 status = -EOVERFLOW;
209
210 } else if (QTD_CERR(token)) {
211 status = -EPIPE;
212
213
214
215
216
217 } else if (token & QTD_STS_MMF) {
218
219 status = -EPROTO;
220 } else if (token & QTD_STS_DBE) {
221 status = (QTD_PID (token) == 1)
222 ? -ENOSR
223 : -ECOMM;
224 } else if (token & QTD_STS_XACT) {
225
226 ehci_dbg(ehci, "devpath %s ep%d%s 3strikes\n",
227 urb->dev->devpath,
228 usb_pipeendpoint(urb->pipe),
229 usb_pipein(urb->pipe) ? "in" : "out");
230 status = -EPROTO;
231 } else {
232 status = -EPROTO;
233 }
234 }
235
236 return status;
237}
238
239static void
240ehci_urb_done(struct ehci_hcd *ehci, struct urb *urb, int status)
241{
242 if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
243
244 ehci_to_hcd(ehci)->self.bandwidth_int_reqs--;
245 }
246
247 if (unlikely(urb->unlinked)) {
248 INCR(ehci->stats.unlink);
249 } else {
250
251 if (status == -EINPROGRESS || status == -EREMOTEIO)
252 status = 0;
253 INCR(ehci->stats.complete);
254 }
255
256#ifdef EHCI_URB_TRACE
257 ehci_dbg (ehci,
258 "%s %s urb %p ep%d%s status %d len %d/%d\n",
259 __func__, urb->dev->devpath, urb,
260 usb_pipeendpoint (urb->pipe),
261 usb_pipein (urb->pipe) ? "in" : "out",
262 status,
263 urb->actual_length, urb->transfer_buffer_length);
264#endif
265
266 usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb);
267 usb_hcd_giveback_urb(ehci_to_hcd(ehci), urb, status);
268}
269
270static int qh_schedule (struct ehci_hcd *ehci, struct ehci_qh *qh);
271
272
273
274
275
276
277static unsigned
278qh_completions (struct ehci_hcd *ehci, struct ehci_qh *qh)
279{
280 struct ehci_qtd *last, *end = qh->dummy;
281 struct list_head *entry, *tmp;
282 int last_status;
283 int stopped;
284 u8 state;
285 struct ehci_qh_hw *hw = qh->hw;
286
287
288
289
290
291
292
293
294
295
296
297 state = qh->qh_state;
298 qh->qh_state = QH_STATE_COMPLETING;
299 stopped = (state == QH_STATE_IDLE);
300
301 rescan:
302 last = NULL;
303 last_status = -EINPROGRESS;
304 qh->dequeue_during_giveback = 0;
305
306
307
308
309
310
311 list_for_each_safe (entry, tmp, &qh->qtd_list) {
312 struct ehci_qtd *qtd;
313 struct urb *urb;
314 u32 token = 0;
315
316 qtd = list_entry (entry, struct ehci_qtd, qtd_list);
317 urb = qtd->urb;
318
319
320 if (last) {
321 if (likely (last->urb != urb)) {
322 ehci_urb_done(ehci, last->urb, last_status);
323 last_status = -EINPROGRESS;
324 }
325 ehci_qtd_free (ehci, last);
326 last = NULL;
327 }
328
329
330 if (qtd == end)
331 break;
332
333
334 rmb ();
335 token = hc32_to_cpu(ehci, qtd->hw_token);
336
337
338 retry_xacterr:
339 if ((token & QTD_STS_ACTIVE) == 0) {
340
341
342 if (token & QTD_STS_DBE)
343 ehci_dbg(ehci,
344 "detected DataBufferErr for urb %p ep%d%s len %d, qtd %p [qh %p]\n",
345 urb,
346 usb_endpoint_num(&urb->ep->desc),
347 usb_endpoint_dir_in(&urb->ep->desc) ? "in" : "out",
348 urb->transfer_buffer_length,
349 qtd,
350 qh);
351
352
353
354
355 if ((token & QTD_STS_HALT) != 0) {
356
357
358
359
360 if ((token & QTD_STS_XACT) &&
361 QTD_CERR(token) == 0 &&
362 ++qh->xacterrs < QH_XACTERR_MAX &&
363 !urb->unlinked) {
364 ehci_dbg(ehci,
365 "detected XactErr len %zu/%zu retry %d\n",
366 qtd->length - QTD_LENGTH(token), qtd->length, qh->xacterrs);
367
368
369
370
371
372
373 token &= ~QTD_STS_HALT;
374 token |= QTD_STS_ACTIVE |
375 (EHCI_TUNE_CERR << 10);
376 qtd->hw_token = cpu_to_hc32(ehci,
377 token);
378 wmb();
379 hw->hw_token = cpu_to_hc32(ehci,
380 token);
381 goto retry_xacterr;
382 }
383 stopped = 1;
384 qh->unlink_reason |= QH_UNLINK_HALTED;
385
386
387
388
389
390
391
392
393
394
395 } else if (IS_SHORT_READ (token)
396 && !(qtd->hw_alt_next
397 & EHCI_LIST_END(ehci))) {
398 stopped = 1;
399 qh->unlink_reason |= QH_UNLINK_SHORT_READ;
400 }
401
402
403 } else if (likely (!stopped
404 && ehci->rh_state >= EHCI_RH_RUNNING)) {
405 break;
406
407
408 } else {
409 stopped = 1;
410
411
412 if (ehci->rh_state < EHCI_RH_RUNNING) {
413 last_status = -ESHUTDOWN;
414 qh->unlink_reason |= QH_UNLINK_SHUTDOWN;
415 }
416
417
418
419
420 else if (last_status == -EINPROGRESS && !urb->unlinked)
421 continue;
422
423
424
425
426
427
428
429
430
431 if (state == QH_STATE_IDLE &&
432 qh->qtd_list.next == &qtd->qtd_list &&
433 (hw->hw_token & ACTIVE_BIT(ehci))) {
434 token = hc32_to_cpu(ehci, hw->hw_token);
435 hw->hw_token &= ~ACTIVE_BIT(ehci);
436 qh->should_be_inactive = 1;
437
438
439
440
441
442 ehci_clear_tt_buffer(ehci, qh, urb, token);
443 }
444 }
445
446
447
448
449
450
451
452
453 if (last_status == -EINPROGRESS) {
454 last_status = qtd_copy_status(ehci, urb,
455 qtd->length, token);
456 if (last_status == -EREMOTEIO
457 && (qtd->hw_alt_next
458 & EHCI_LIST_END(ehci)))
459 last_status = -EINPROGRESS;
460
461
462
463
464 if (unlikely(last_status != -EINPROGRESS &&
465 last_status != -EREMOTEIO)) {
466
467
468
469
470
471
472
473
474
475 if (last_status != -EPIPE)
476 ehci_clear_tt_buffer(ehci, qh, urb,
477 token);
478 }
479 }
480
481
482
483
484 if (stopped && qtd->qtd_list.prev != &qh->qtd_list) {
485 last = list_entry (qtd->qtd_list.prev,
486 struct ehci_qtd, qtd_list);
487 last->hw_next = qtd->hw_next;
488 }
489
490
491 list_del (&qtd->qtd_list);
492 last = qtd;
493
494
495 qh->xacterrs = 0;
496 }
497
498
499 if (likely (last != NULL)) {
500 ehci_urb_done(ehci, last->urb, last_status);
501 ehci_qtd_free (ehci, last);
502 }
503
504
505 if (unlikely(qh->dequeue_during_giveback)) {
506
507 if (state == QH_STATE_IDLE)
508 goto rescan;
509
510
511 }
512
513
514 qh->qh_state = state;
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531 if (stopped != 0 || hw->hw_qtd_next == EHCI_LIST_END(ehci))
532 qh->unlink_reason |= QH_UNLINK_DUMMY_OVERLAY;
533
534
535 return qh->unlink_reason;
536}
537
538
539
540
541
542
543
544static void qtd_list_free (
545 struct ehci_hcd *ehci,
546 struct urb *urb,
547 struct list_head *qtd_list
548) {
549 struct list_head *entry, *temp;
550
551 list_for_each_safe (entry, temp, qtd_list) {
552 struct ehci_qtd *qtd;
553
554 qtd = list_entry (entry, struct ehci_qtd, qtd_list);
555 list_del (&qtd->qtd_list);
556 ehci_qtd_free (ehci, qtd);
557 }
558}
559
560
561
562
563static struct list_head *
564qh_urb_transaction (
565 struct ehci_hcd *ehci,
566 struct urb *urb,
567 struct list_head *head,
568 gfp_t flags
569) {
570 struct ehci_qtd *qtd, *qtd_prev;
571 dma_addr_t buf;
572 int len, this_sg_len, maxpacket;
573 int is_input;
574 u32 token;
575 int i;
576 struct scatterlist *sg;
577
578
579
580
581 qtd = ehci_qtd_alloc (ehci, flags);
582 if (unlikely (!qtd))
583 return NULL;
584 list_add_tail (&qtd->qtd_list, head);
585 qtd->urb = urb;
586
587 token = QTD_STS_ACTIVE;
588 token |= (EHCI_TUNE_CERR << 10);
589
590
591 len = urb->transfer_buffer_length;
592 is_input = usb_pipein (urb->pipe);
593 if (usb_pipecontrol (urb->pipe)) {
594
595 qtd_fill(ehci, qtd, urb->setup_dma,
596 sizeof (struct usb_ctrlrequest),
597 token | (2 << 8), 8);
598
599
600 token ^= QTD_TOGGLE;
601 qtd_prev = qtd;
602 qtd = ehci_qtd_alloc (ehci, flags);
603 if (unlikely (!qtd))
604 goto cleanup;
605 qtd->urb = urb;
606 qtd_prev->hw_next = QTD_NEXT(ehci, qtd->qtd_dma);
607 list_add_tail (&qtd->qtd_list, head);
608
609
610 if (len == 0)
611 token |= (1 << 8);
612 }
613
614
615
616
617 i = urb->num_mapped_sgs;
618 if (len > 0 && i > 0) {
619 sg = urb->sg;
620 buf = sg_dma_address(sg);
621
622
623
624
625 this_sg_len = min_t(int, sg_dma_len(sg), len);
626 } else {
627 sg = NULL;
628 buf = urb->transfer_dma;
629 this_sg_len = len;
630 }
631
632 if (is_input)
633 token |= (1 << 8);
634
635
636 maxpacket = usb_maxpacket(urb->dev, urb->pipe, !is_input);
637
638
639
640
641
642
643 for (;;) {
644 int this_qtd_len;
645
646 this_qtd_len = qtd_fill(ehci, qtd, buf, this_sg_len, token,
647 maxpacket);
648 this_sg_len -= this_qtd_len;
649 len -= this_qtd_len;
650 buf += this_qtd_len;
651
652
653
654
655
656
657 if (is_input)
658 qtd->hw_alt_next = ehci->async->hw->hw_alt_next;
659
660
661 if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
662 token ^= QTD_TOGGLE;
663
664 if (likely(this_sg_len <= 0)) {
665 if (--i <= 0 || len <= 0)
666 break;
667 sg = sg_next(sg);
668 buf = sg_dma_address(sg);
669 this_sg_len = min_t(int, sg_dma_len(sg), len);
670 }
671
672 qtd_prev = qtd;
673 qtd = ehci_qtd_alloc (ehci, flags);
674 if (unlikely (!qtd))
675 goto cleanup;
676 qtd->urb = urb;
677 qtd_prev->hw_next = QTD_NEXT(ehci, qtd->qtd_dma);
678 list_add_tail (&qtd->qtd_list, head);
679 }
680
681
682
683
684
685
686 if (likely ((urb->transfer_flags & URB_SHORT_NOT_OK) == 0
687 || usb_pipecontrol (urb->pipe)))
688 qtd->hw_alt_next = EHCI_LIST_END(ehci);
689
690
691
692
693
694
695 if (likely (urb->transfer_buffer_length != 0)) {
696 int one_more = 0;
697
698 if (usb_pipecontrol (urb->pipe)) {
699 one_more = 1;
700 token ^= 0x0100;
701 token |= QTD_TOGGLE;
702 } else if (usb_pipeout(urb->pipe)
703 && (urb->transfer_flags & URB_ZERO_PACKET)
704 && !(urb->transfer_buffer_length % maxpacket)) {
705 one_more = 1;
706 }
707 if (one_more) {
708 qtd_prev = qtd;
709 qtd = ehci_qtd_alloc (ehci, flags);
710 if (unlikely (!qtd))
711 goto cleanup;
712 qtd->urb = urb;
713 qtd_prev->hw_next = QTD_NEXT(ehci, qtd->qtd_dma);
714 list_add_tail (&qtd->qtd_list, head);
715
716
717 qtd_fill(ehci, qtd, 0, 0, token, 0);
718 }
719 }
720
721
722 if (likely (!(urb->transfer_flags & URB_NO_INTERRUPT)))
723 qtd->hw_token |= cpu_to_hc32(ehci, QTD_IOC);
724 return head;
725
726cleanup:
727 qtd_list_free (ehci, urb, head);
728 return NULL;
729}
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748static struct ehci_qh *
749qh_make (
750 struct ehci_hcd *ehci,
751 struct urb *urb,
752 gfp_t flags
753) {
754 struct ehci_qh *qh = ehci_qh_alloc (ehci, flags);
755 struct usb_host_endpoint *ep;
756 u32 info1 = 0, info2 = 0;
757 int is_input, type;
758 int maxp = 0;
759 int mult;
760 struct usb_tt *tt = urb->dev->tt;
761 struct ehci_qh_hw *hw;
762
763 if (!qh)
764 return qh;
765
766
767
768
769 info1 |= usb_pipeendpoint (urb->pipe) << 8;
770 info1 |= usb_pipedevice (urb->pipe) << 0;
771
772 is_input = usb_pipein (urb->pipe);
773 type = usb_pipetype (urb->pipe);
774 ep = usb_pipe_endpoint (urb->dev, urb->pipe);
775 maxp = usb_endpoint_maxp (&ep->desc);
776 mult = usb_endpoint_maxp_mult (&ep->desc);
777
778
779
780
781 if (maxp > 1024) {
782 ehci_dbg(ehci, "bogus qh maxpacket %d\n", maxp);
783 goto done;
784 }
785
786
787
788
789
790
791
792
793
794 if (type == PIPE_INTERRUPT) {
795 unsigned tmp;
796
797 qh->ps.usecs = NS_TO_US(usb_calc_bus_time(USB_SPEED_HIGH,
798 is_input, 0, mult * maxp));
799 qh->ps.phase = NO_FRAME;
800
801 if (urb->dev->speed == USB_SPEED_HIGH) {
802 qh->ps.c_usecs = 0;
803 qh->gap_uf = 0;
804
805 if (urb->interval > 1 && urb->interval < 8) {
806
807
808
809
810 urb->interval = 1;
811 } else if (urb->interval > ehci->periodic_size << 3) {
812 urb->interval = ehci->periodic_size << 3;
813 }
814 qh->ps.period = urb->interval >> 3;
815
816
817 tmp = min_t(unsigned, EHCI_BANDWIDTH_SIZE,
818 1 << (urb->ep->desc.bInterval - 1));
819
820
821 qh->ps.bw_uperiod = min_t(unsigned, tmp, urb->interval);
822 qh->ps.bw_period = qh->ps.bw_uperiod >> 3;
823 } else {
824 int think_time;
825
826
827 qh->gap_uf = 1 + usb_calc_bus_time (urb->dev->speed,
828 is_input, 0, maxp) / (125 * 1000);
829
830
831 if (is_input) {
832 qh->ps.c_usecs = qh->ps.usecs + HS_USECS(0);
833 qh->ps.usecs = HS_USECS(1);
834 } else {
835 qh->ps.usecs += HS_USECS(1);
836 qh->ps.c_usecs = HS_USECS(0);
837 }
838
839 think_time = tt ? tt->think_time : 0;
840 qh->ps.tt_usecs = NS_TO_US(think_time +
841 usb_calc_bus_time (urb->dev->speed,
842 is_input, 0, maxp));
843 if (urb->interval > ehci->periodic_size)
844 urb->interval = ehci->periodic_size;
845 qh->ps.period = urb->interval;
846
847
848 tmp = min_t(unsigned, EHCI_BANDWIDTH_FRAMES,
849 urb->ep->desc.bInterval);
850 tmp = rounddown_pow_of_two(tmp);
851
852
853 qh->ps.bw_period = min_t(unsigned, tmp, urb->interval);
854 qh->ps.bw_uperiod = qh->ps.bw_period << 3;
855 }
856 }
857
858
859 qh->ps.udev = urb->dev;
860 qh->ps.ep = urb->ep;
861
862
863 switch (urb->dev->speed) {
864 case USB_SPEED_LOW:
865 info1 |= QH_LOW_SPEED;
866
867
868 case USB_SPEED_FULL:
869
870 if (type != PIPE_INTERRUPT)
871 info1 |= (EHCI_TUNE_RL_TT << 28);
872 if (type == PIPE_CONTROL) {
873 info1 |= QH_CONTROL_EP;
874 info1 |= QH_TOGGLE_CTL;
875 }
876 info1 |= maxp << 16;
877
878 info2 |= (EHCI_TUNE_MULT_TT << 30);
879
880
881
882
883 if (ehci_has_fsl_portno_bug(ehci))
884 info2 |= (urb->dev->ttport-1) << 23;
885 else
886 info2 |= urb->dev->ttport << 23;
887
888
889
890
891 if (tt && tt->hub != ehci_to_hcd(ehci)->self.root_hub)
892 info2 |= tt->hub->devnum << 16;
893
894
895
896 break;
897
898 case USB_SPEED_HIGH:
899 info1 |= QH_HIGH_SPEED;
900 if (type == PIPE_CONTROL) {
901 info1 |= (EHCI_TUNE_RL_HS << 28);
902 info1 |= 64 << 16;
903 info1 |= QH_TOGGLE_CTL;
904 info2 |= (EHCI_TUNE_MULT_HS << 30);
905 } else if (type == PIPE_BULK) {
906 info1 |= (EHCI_TUNE_RL_HS << 28);
907
908
909
910
911
912
913 info1 |= maxp << 16;
914 info2 |= (EHCI_TUNE_MULT_HS << 30);
915 } else {
916 info1 |= maxp << 16;
917 info2 |= mult << 30;
918 }
919 break;
920 default:
921 ehci_dbg(ehci, "bogus dev %p speed %d\n", urb->dev,
922 urb->dev->speed);
923done:
924 qh_destroy(ehci, qh);
925 return NULL;
926 }
927
928
929
930
931 qh->qh_state = QH_STATE_IDLE;
932 hw = qh->hw;
933 hw->hw_info1 = cpu_to_hc32(ehci, info1);
934 hw->hw_info2 = cpu_to_hc32(ehci, info2);
935 qh->is_out = !is_input;
936 usb_settoggle (urb->dev, usb_pipeendpoint (urb->pipe), !is_input, 1);
937 return qh;
938}
939
940
941
942static void enable_async(struct ehci_hcd *ehci)
943{
944 if (ehci->async_count++)
945 return;
946
947
948 ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_DISABLE_ASYNC);
949
950
951 ehci_poll_ASS(ehci);
952 turn_on_io_watchdog(ehci);
953}
954
955static void disable_async(struct ehci_hcd *ehci)
956{
957 if (--ehci->async_count)
958 return;
959
960
961 WARN_ON(ehci->async->qh_next.qh || !list_empty(&ehci->async_unlink) ||
962 !list_empty(&ehci->async_idle));
963
964
965 ehci_poll_ASS(ehci);
966}
967
968
969
970static void qh_link_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
971{
972 __hc32 dma = QH_NEXT(ehci, qh->qh_dma);
973 struct ehci_qh *head;
974
975
976 if (unlikely(qh->clearing_tt))
977 return;
978
979 WARN_ON(qh->qh_state != QH_STATE_IDLE);
980
981
982 qh_refresh(ehci, qh);
983
984
985 head = ehci->async;
986 qh->qh_next = head->qh_next;
987 qh->hw->hw_next = head->hw->hw_next;
988 wmb ();
989
990 head->qh_next.qh = qh;
991 head->hw->hw_next = dma;
992
993 qh->qh_state = QH_STATE_LINKED;
994 qh->xacterrs = 0;
995 qh->unlink_reason = 0;
996
997
998 enable_async(ehci);
999}
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009static struct ehci_qh *qh_append_tds (
1010 struct ehci_hcd *ehci,
1011 struct urb *urb,
1012 struct list_head *qtd_list,
1013 int epnum,
1014 void **ptr
1015)
1016{
1017 struct ehci_qh *qh = NULL;
1018 __hc32 qh_addr_mask = cpu_to_hc32(ehci, 0x7f);
1019
1020 qh = (struct ehci_qh *) *ptr;
1021 if (unlikely (qh == NULL)) {
1022
1023 qh = qh_make (ehci, urb, GFP_ATOMIC);
1024 *ptr = qh;
1025 }
1026 if (likely (qh != NULL)) {
1027 struct ehci_qtd *qtd;
1028
1029 if (unlikely (list_empty (qtd_list)))
1030 qtd = NULL;
1031 else
1032 qtd = list_entry (qtd_list->next, struct ehci_qtd,
1033 qtd_list);
1034
1035
1036 if (unlikely (epnum == 0)) {
1037
1038
1039 if (usb_pipedevice (urb->pipe) == 0)
1040 qh->hw->hw_info1 &= ~qh_addr_mask;
1041 }
1042
1043
1044
1045
1046 if (likely (qtd != NULL)) {
1047 struct ehci_qtd *dummy;
1048 dma_addr_t dma;
1049 __hc32 token;
1050
1051
1052
1053
1054
1055
1056 token = qtd->hw_token;
1057 qtd->hw_token = HALT_BIT(ehci);
1058
1059 dummy = qh->dummy;
1060
1061 dma = dummy->qtd_dma;
1062 *dummy = *qtd;
1063 dummy->qtd_dma = dma;
1064
1065 list_del (&qtd->qtd_list);
1066 list_add (&dummy->qtd_list, qtd_list);
1067 list_splice_tail(qtd_list, &qh->qtd_list);
1068
1069 ehci_qtd_init(ehci, qtd, qtd->qtd_dma);
1070 qh->dummy = qtd;
1071
1072
1073 dma = qtd->qtd_dma;
1074 qtd = list_entry (qh->qtd_list.prev,
1075 struct ehci_qtd, qtd_list);
1076 qtd->hw_next = QTD_NEXT(ehci, dma);
1077
1078
1079 wmb ();
1080 dummy->hw_token = token;
1081
1082 urb->hcpriv = qh;
1083 }
1084 }
1085 return qh;
1086}
1087
1088
1089
1090static int
1091submit_async (
1092 struct ehci_hcd *ehci,
1093 struct urb *urb,
1094 struct list_head *qtd_list,
1095 gfp_t mem_flags
1096) {
1097 int epnum;
1098 unsigned long flags;
1099 struct ehci_qh *qh = NULL;
1100 int rc;
1101
1102 epnum = urb->ep->desc.bEndpointAddress;
1103
1104#ifdef EHCI_URB_TRACE
1105 {
1106 struct ehci_qtd *qtd;
1107 qtd = list_entry(qtd_list->next, struct ehci_qtd, qtd_list);
1108 ehci_dbg(ehci,
1109 "%s %s urb %p ep%d%s len %d, qtd %p [qh %p]\n",
1110 __func__, urb->dev->devpath, urb,
1111 epnum & 0x0f, (epnum & USB_DIR_IN) ? "in" : "out",
1112 urb->transfer_buffer_length,
1113 qtd, urb->ep->hcpriv);
1114 }
1115#endif
1116
1117 spin_lock_irqsave (&ehci->lock, flags);
1118 if (unlikely(!HCD_HW_ACCESSIBLE(ehci_to_hcd(ehci)))) {
1119 rc = -ESHUTDOWN;
1120 goto done;
1121 }
1122 rc = usb_hcd_link_urb_to_ep(ehci_to_hcd(ehci), urb);
1123 if (unlikely(rc))
1124 goto done;
1125
1126 qh = qh_append_tds(ehci, urb, qtd_list, epnum, &urb->ep->hcpriv);
1127 if (unlikely(qh == NULL)) {
1128 usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb);
1129 rc = -ENOMEM;
1130 goto done;
1131 }
1132
1133
1134
1135
1136 if (likely (qh->qh_state == QH_STATE_IDLE))
1137 qh_link_async(ehci, qh);
1138 done:
1139 spin_unlock_irqrestore (&ehci->lock, flags);
1140 if (unlikely (qh == NULL))
1141 qtd_list_free (ehci, urb, qtd_list);
1142 return rc;
1143}
1144
1145
1146#ifdef CONFIG_USB_HCD_TEST_MODE
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157static int submit_single_step_set_feature(
1158 struct usb_hcd *hcd,
1159 struct urb *urb,
1160 int is_setup
1161) {
1162 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1163 struct list_head qtd_list;
1164 struct list_head *head;
1165
1166 struct ehci_qtd *qtd, *qtd_prev;
1167 dma_addr_t buf;
1168 int len, maxpacket;
1169 u32 token;
1170
1171 INIT_LIST_HEAD(&qtd_list);
1172 head = &qtd_list;
1173
1174
1175 qtd = ehci_qtd_alloc(ehci, GFP_KERNEL);
1176 if (unlikely(!qtd))
1177 return -1;
1178 list_add_tail(&qtd->qtd_list, head);
1179 qtd->urb = urb;
1180
1181 token = QTD_STS_ACTIVE;
1182 token |= (EHCI_TUNE_CERR << 10);
1183
1184 len = urb->transfer_buffer_length;
1185
1186
1187
1188
1189
1190 if (is_setup) {
1191
1192 qtd_fill(ehci, qtd, urb->setup_dma,
1193 sizeof(struct usb_ctrlrequest),
1194 QTD_IOC | token | (2 << 8), 8);
1195
1196 submit_async(ehci, urb, &qtd_list, GFP_ATOMIC);
1197 return 0;
1198 }
1199
1200
1201
1202
1203
1204 token ^= QTD_TOGGLE;
1205 buf = urb->transfer_dma;
1206
1207 token |= (1 << 8);
1208
1209 maxpacket = usb_maxpacket(urb->dev, urb->pipe, 0);
1210
1211 qtd_fill(ehci, qtd, buf, len, token, maxpacket);
1212
1213
1214
1215
1216
1217 qtd->hw_alt_next = EHCI_LIST_END(ehci);
1218
1219
1220 token ^= 0x0100;
1221 token |= QTD_TOGGLE;
1222
1223 qtd_prev = qtd;
1224 qtd = ehci_qtd_alloc(ehci, GFP_ATOMIC);
1225 if (unlikely(!qtd))
1226 goto cleanup;
1227 qtd->urb = urb;
1228 qtd_prev->hw_next = QTD_NEXT(ehci, qtd->qtd_dma);
1229 list_add_tail(&qtd->qtd_list, head);
1230
1231
1232 qtd_fill(ehci, qtd, 0, 0, token | QTD_IOC, 0);
1233
1234 submit_async(ehci, urb, &qtd_list, GFP_KERNEL);
1235
1236 return 0;
1237
1238cleanup:
1239 qtd_list_free(ehci, urb, head);
1240 return -1;
1241}
1242#endif
1243
1244
1245
1246static void single_unlink_async(struct ehci_hcd *ehci, struct ehci_qh *qh)
1247{
1248 struct ehci_qh *prev;
1249
1250
1251 qh->qh_state = QH_STATE_UNLINK_WAIT;
1252 list_add_tail(&qh->unlink_node, &ehci->async_unlink);
1253
1254
1255 prev = ehci->async;
1256 while (prev->qh_next.qh != qh)
1257 prev = prev->qh_next.qh;
1258
1259 prev->hw->hw_next = qh->hw->hw_next;
1260 prev->qh_next = qh->qh_next;
1261 if (ehci->qh_scan_next == qh)
1262 ehci->qh_scan_next = qh->qh_next.qh;
1263}
1264
1265static void start_iaa_cycle(struct ehci_hcd *ehci)
1266{
1267
1268 if (unlikely(ehci->rh_state < EHCI_RH_RUNNING)) {
1269 end_unlink_async(ehci);
1270
1271
1272 } else if (ehci->rh_state == EHCI_RH_RUNNING &&
1273 !ehci->iaa_in_progress) {
1274
1275
1276 wmb();
1277
1278 ehci_writel(ehci, ehci->command | CMD_IAAD,
1279 &ehci->regs->command);
1280 ehci_readl(ehci, &ehci->regs->command);
1281 ehci->iaa_in_progress = true;
1282 ehci_enable_event(ehci, EHCI_HRTIMER_IAA_WATCHDOG, true);
1283 }
1284}
1285
1286static void end_iaa_cycle(struct ehci_hcd *ehci)
1287{
1288 if (ehci->has_synopsys_hc_bug)
1289 ehci_writel(ehci, (u32) ehci->async->qh_dma,
1290 &ehci->regs->async_next);
1291
1292
1293 ehci->iaa_in_progress = false;
1294
1295 end_unlink_async(ehci);
1296}
1297
1298
1299
1300static void end_unlink_async(struct ehci_hcd *ehci)
1301{
1302 struct ehci_qh *qh;
1303 bool early_exit;
1304
1305 if (list_empty(&ehci->async_unlink))
1306 return;
1307 qh = list_first_entry(&ehci->async_unlink, struct ehci_qh,
1308 unlink_node);
1309
1310
1311
1312
1313
1314 early_exit = ehci->async_unlinking;
1315
1316
1317 if (ehci->rh_state < EHCI_RH_RUNNING)
1318 list_splice_tail_init(&ehci->async_unlink, &ehci->async_idle);
1319
1320
1321
1322
1323
1324
1325 else if (qh->qh_state == QH_STATE_UNLINK) {
1326
1327
1328
1329
1330 list_move_tail(&qh->unlink_node, &ehci->async_idle);
1331 }
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347 else if (qh->unlink_reason & (QH_UNLINK_HALTED |
1348 QH_UNLINK_SHORT_READ | QH_UNLINK_DUMMY_OVERLAY))
1349 goto DelayDone;
1350
1351
1352 else if ((qh->unlink_reason & QH_UNLINK_QUEUE_EMPTY) &&
1353 list_empty(&qh->qtd_list))
1354 goto DelayDone;
1355
1356
1357 else if (qh->hw->hw_token & cpu_to_hc32(ehci, QTD_STS_HALT))
1358 goto DelayDone;
1359
1360
1361 else {
1362 __hc32 qh_current, qh_token;
1363
1364 qh_current = qh->hw->hw_current;
1365 qh_token = qh->hw->hw_token;
1366 if (qh_current != ehci->old_current ||
1367 qh_token != ehci->old_token) {
1368 ehci->old_current = qh_current;
1369 ehci->old_token = qh_token;
1370 ehci_enable_event(ehci,
1371 EHCI_HRTIMER_ACTIVE_UNLINK, true);
1372 return;
1373 }
1374 DelayDone:
1375 qh->qh_state = QH_STATE_UNLINK;
1376 early_exit = true;
1377 }
1378 ehci->old_current = ~0;
1379
1380
1381 if (!list_empty(&ehci->async_unlink))
1382 start_iaa_cycle(ehci);
1383
1384
1385
1386
1387
1388 if (early_exit)
1389 return;
1390
1391
1392 ehci->async_unlinking = true;
1393 while (!list_empty(&ehci->async_idle)) {
1394 qh = list_first_entry(&ehci->async_idle, struct ehci_qh,
1395 unlink_node);
1396 list_del(&qh->unlink_node);
1397
1398 qh->qh_state = QH_STATE_IDLE;
1399 qh->qh_next.qh = NULL;
1400
1401 if (!list_empty(&qh->qtd_list))
1402 qh_completions(ehci, qh);
1403 if (!list_empty(&qh->qtd_list) &&
1404 ehci->rh_state == EHCI_RH_RUNNING)
1405 qh_link_async(ehci, qh);
1406 disable_async(ehci);
1407 }
1408 ehci->async_unlinking = false;
1409}
1410
1411static void start_unlink_async(struct ehci_hcd *ehci, struct ehci_qh *qh);
1412
1413static void unlink_empty_async(struct ehci_hcd *ehci)
1414{
1415 struct ehci_qh *qh;
1416 struct ehci_qh *qh_to_unlink = NULL;
1417 int count = 0;
1418
1419
1420 for (qh = ehci->async->qh_next.qh; qh; qh = qh->qh_next.qh) {
1421 if (list_empty(&qh->qtd_list) &&
1422 qh->qh_state == QH_STATE_LINKED) {
1423 ++count;
1424 if (qh->unlink_cycle != ehci->async_unlink_cycle)
1425 qh_to_unlink = qh;
1426 }
1427 }
1428
1429
1430 if (list_empty(&ehci->async_unlink) && qh_to_unlink) {
1431 qh_to_unlink->unlink_reason |= QH_UNLINK_QUEUE_EMPTY;
1432 start_unlink_async(ehci, qh_to_unlink);
1433 --count;
1434 }
1435
1436
1437 if (count > 0) {
1438 ehci_enable_event(ehci, EHCI_HRTIMER_ASYNC_UNLINKS, true);
1439 ++ehci->async_unlink_cycle;
1440 }
1441}
1442
1443#ifdef CONFIG_PM
1444
1445
1446static void unlink_empty_async_suspended(struct ehci_hcd *ehci)
1447{
1448 struct ehci_qh *qh;
1449
1450 while (ehci->async->qh_next.qh) {
1451 qh = ehci->async->qh_next.qh;
1452 WARN_ON(!list_empty(&qh->qtd_list));
1453 single_unlink_async(ehci, qh);
1454 }
1455}
1456
1457#endif
1458
1459
1460
1461
1462static void start_unlink_async(struct ehci_hcd *ehci, struct ehci_qh *qh)
1463{
1464
1465 if (qh->qh_state != QH_STATE_LINKED)
1466 return;
1467
1468 single_unlink_async(ehci, qh);
1469 start_iaa_cycle(ehci);
1470}
1471
1472
1473
1474static void scan_async (struct ehci_hcd *ehci)
1475{
1476 struct ehci_qh *qh;
1477 bool check_unlinks_later = false;
1478
1479 ehci->qh_scan_next = ehci->async->qh_next.qh;
1480 while (ehci->qh_scan_next) {
1481 qh = ehci->qh_scan_next;
1482 ehci->qh_scan_next = qh->qh_next.qh;
1483
1484
1485 if (!list_empty(&qh->qtd_list)) {
1486 int temp;
1487
1488
1489
1490
1491
1492
1493
1494
1495 temp = qh_completions(ehci, qh);
1496 if (unlikely(temp)) {
1497 start_unlink_async(ehci, qh);
1498 } else if (list_empty(&qh->qtd_list)
1499 && qh->qh_state == QH_STATE_LINKED) {
1500 qh->unlink_cycle = ehci->async_unlink_cycle;
1501 check_unlinks_later = true;
1502 }
1503 }
1504 }
1505
1506
1507
1508
1509
1510
1511
1512 if (check_unlinks_later && ehci->rh_state == EHCI_RH_RUNNING &&
1513 !(ehci->enabled_hrtimer_events &
1514 BIT(EHCI_HRTIMER_ASYNC_UNLINKS))) {
1515 ehci_enable_event(ehci, EHCI_HRTIMER_ASYNC_UNLINKS, true);
1516 ++ehci->async_unlink_cycle;
1517 }
1518}
1519