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8
9#include <linux/delay.h>
10#include <linux/idr.h>
11#include <linux/nvmem-provider.h>
12#include <linux/pm_runtime.h>
13#include <linux/sched/signal.h>
14#include <linux/sizes.h>
15#include <linux/slab.h>
16
17#include "tb.h"
18
19
20
21#define NVM_CSS 0x10
22
23struct nvm_auth_status {
24 struct list_head list;
25 uuid_t uuid;
26 u32 status;
27};
28
29
30
31
32
33
34static LIST_HEAD(nvm_auth_status_cache);
35static DEFINE_MUTEX(nvm_auth_status_lock);
36
37static struct nvm_auth_status *__nvm_get_auth_status(const struct tb_switch *sw)
38{
39 struct nvm_auth_status *st;
40
41 list_for_each_entry(st, &nvm_auth_status_cache, list) {
42 if (uuid_equal(&st->uuid, sw->uuid))
43 return st;
44 }
45
46 return NULL;
47}
48
49static void nvm_get_auth_status(const struct tb_switch *sw, u32 *status)
50{
51 struct nvm_auth_status *st;
52
53 mutex_lock(&nvm_auth_status_lock);
54 st = __nvm_get_auth_status(sw);
55 mutex_unlock(&nvm_auth_status_lock);
56
57 *status = st ? st->status : 0;
58}
59
60static void nvm_set_auth_status(const struct tb_switch *sw, u32 status)
61{
62 struct nvm_auth_status *st;
63
64 if (WARN_ON(!sw->uuid))
65 return;
66
67 mutex_lock(&nvm_auth_status_lock);
68 st = __nvm_get_auth_status(sw);
69
70 if (!st) {
71 st = kzalloc(sizeof(*st), GFP_KERNEL);
72 if (!st)
73 goto unlock;
74
75 memcpy(&st->uuid, sw->uuid, sizeof(st->uuid));
76 INIT_LIST_HEAD(&st->list);
77 list_add_tail(&st->list, &nvm_auth_status_cache);
78 }
79
80 st->status = status;
81unlock:
82 mutex_unlock(&nvm_auth_status_lock);
83}
84
85static void nvm_clear_auth_status(const struct tb_switch *sw)
86{
87 struct nvm_auth_status *st;
88
89 mutex_lock(&nvm_auth_status_lock);
90 st = __nvm_get_auth_status(sw);
91 if (st) {
92 list_del(&st->list);
93 kfree(st);
94 }
95 mutex_unlock(&nvm_auth_status_lock);
96}
97
98static int nvm_validate_and_write(struct tb_switch *sw)
99{
100 unsigned int image_size, hdr_size;
101 const u8 *buf = sw->nvm->buf;
102 u16 ds_size;
103 int ret;
104
105 if (!buf)
106 return -EINVAL;
107
108 image_size = sw->nvm->buf_data_size;
109 if (image_size < NVM_MIN_SIZE || image_size > NVM_MAX_SIZE)
110 return -EINVAL;
111
112
113
114
115
116 hdr_size = (*(u32 *)buf) & 0xffffff;
117 if (hdr_size + NVM_DEVID + 2 >= image_size)
118 return -EINVAL;
119
120
121 if (!IS_ALIGNED(hdr_size, SZ_4K))
122 return -EINVAL;
123
124
125
126
127
128 ds_size = *(u16 *)(buf + hdr_size);
129 if (ds_size >= image_size)
130 return -EINVAL;
131
132 if (!sw->safe_mode) {
133 u16 device_id;
134
135
136
137
138
139 device_id = *(u16 *)(buf + hdr_size + NVM_DEVID);
140 if (device_id != sw->config.device_id)
141 return -EINVAL;
142
143 if (sw->generation < 3) {
144
145 ret = dma_port_flash_write(sw->dma_port,
146 DMA_PORT_CSS_ADDRESS, buf + NVM_CSS,
147 DMA_PORT_CSS_MAX_SIZE);
148 if (ret)
149 return ret;
150 }
151
152
153 buf += hdr_size;
154 image_size -= hdr_size;
155 }
156
157 if (tb_switch_is_usb4(sw))
158 ret = usb4_switch_nvm_write(sw, 0, buf, image_size);
159 else
160 ret = dma_port_flash_write(sw->dma_port, 0, buf, image_size);
161 if (!ret)
162 sw->nvm->flushed = true;
163 return ret;
164}
165
166static int nvm_authenticate_host_dma_port(struct tb_switch *sw)
167{
168 int ret = 0;
169
170
171
172
173
174
175 if (!sw->safe_mode) {
176 u32 status;
177
178 ret = tb_domain_disconnect_all_paths(sw->tb);
179 if (ret)
180 return ret;
181
182
183
184
185 ret = dma_port_flash_update_auth(sw->dma_port);
186 if (!ret || ret == -ETIMEDOUT)
187 return 0;
188
189
190
191
192
193 tb_sw_warn(sw, "failed to authenticate NVM, power cycling\n");
194 if (dma_port_flash_update_auth_status(sw->dma_port, &status) > 0)
195 nvm_set_auth_status(sw, status);
196 }
197
198
199
200
201
202 dma_port_power_cycle(sw->dma_port);
203 return ret;
204}
205
206static int nvm_authenticate_device_dma_port(struct tb_switch *sw)
207{
208 int ret, retries = 10;
209
210 ret = dma_port_flash_update_auth(sw->dma_port);
211 switch (ret) {
212 case 0:
213 case -ETIMEDOUT:
214 case -EACCES:
215 case -EINVAL:
216
217 break;
218 default:
219 return ret;
220 }
221
222
223
224
225
226
227
228 do {
229 u32 status;
230
231 ret = dma_port_flash_update_auth_status(sw->dma_port, &status);
232 if (ret < 0 && ret != -ETIMEDOUT)
233 return ret;
234 if (ret > 0) {
235 if (status) {
236 tb_sw_warn(sw, "failed to authenticate NVM\n");
237 nvm_set_auth_status(sw, status);
238 }
239
240 tb_sw_info(sw, "power cycling the switch now\n");
241 dma_port_power_cycle(sw->dma_port);
242 return 0;
243 }
244
245 msleep(500);
246 } while (--retries);
247
248 return -ETIMEDOUT;
249}
250
251static void nvm_authenticate_start_dma_port(struct tb_switch *sw)
252{
253 struct pci_dev *root_port;
254
255
256
257
258
259
260
261 root_port = pcie_find_root_port(sw->tb->nhi->pdev);
262 if (root_port)
263 pm_runtime_get_noresume(&root_port->dev);
264}
265
266static void nvm_authenticate_complete_dma_port(struct tb_switch *sw)
267{
268 struct pci_dev *root_port;
269
270 root_port = pcie_find_root_port(sw->tb->nhi->pdev);
271 if (root_port)
272 pm_runtime_put(&root_port->dev);
273}
274
275static inline bool nvm_readable(struct tb_switch *sw)
276{
277 if (tb_switch_is_usb4(sw)) {
278
279
280
281
282
283
284 return usb4_switch_nvm_sector_size(sw) > 0;
285 }
286
287
288 return !!sw->dma_port;
289}
290
291static inline bool nvm_upgradeable(struct tb_switch *sw)
292{
293 if (sw->no_nvm_upgrade)
294 return false;
295 return nvm_readable(sw);
296}
297
298static inline int nvm_read(struct tb_switch *sw, unsigned int address,
299 void *buf, size_t size)
300{
301 if (tb_switch_is_usb4(sw))
302 return usb4_switch_nvm_read(sw, address, buf, size);
303 return dma_port_flash_read(sw->dma_port, address, buf, size);
304}
305
306static int nvm_authenticate(struct tb_switch *sw, bool auth_only)
307{
308 int ret;
309
310 if (tb_switch_is_usb4(sw)) {
311 if (auth_only) {
312 ret = usb4_switch_nvm_set_offset(sw, 0);
313 if (ret)
314 return ret;
315 }
316 sw->nvm->authenticating = true;
317 return usb4_switch_nvm_authenticate(sw);
318 } else if (auth_only) {
319 return -EOPNOTSUPP;
320 }
321
322 sw->nvm->authenticating = true;
323 if (!tb_route(sw)) {
324 nvm_authenticate_start_dma_port(sw);
325 ret = nvm_authenticate_host_dma_port(sw);
326 } else {
327 ret = nvm_authenticate_device_dma_port(sw);
328 }
329
330 return ret;
331}
332
333static int tb_switch_nvm_read(void *priv, unsigned int offset, void *val,
334 size_t bytes)
335{
336 struct tb_nvm *nvm = priv;
337 struct tb_switch *sw = tb_to_switch(nvm->dev);
338 int ret;
339
340 pm_runtime_get_sync(&sw->dev);
341
342 if (!mutex_trylock(&sw->tb->lock)) {
343 ret = restart_syscall();
344 goto out;
345 }
346
347 ret = nvm_read(sw, offset, val, bytes);
348 mutex_unlock(&sw->tb->lock);
349
350out:
351 pm_runtime_mark_last_busy(&sw->dev);
352 pm_runtime_put_autosuspend(&sw->dev);
353
354 return ret;
355}
356
357static int tb_switch_nvm_write(void *priv, unsigned int offset, void *val,
358 size_t bytes)
359{
360 struct tb_nvm *nvm = priv;
361 struct tb_switch *sw = tb_to_switch(nvm->dev);
362 int ret;
363
364 if (!mutex_trylock(&sw->tb->lock))
365 return restart_syscall();
366
367
368
369
370
371
372
373 ret = tb_nvm_write_buf(nvm, offset, val, bytes);
374 mutex_unlock(&sw->tb->lock);
375
376 return ret;
377}
378
379static int tb_switch_nvm_add(struct tb_switch *sw)
380{
381 struct tb_nvm *nvm;
382 u32 val;
383 int ret;
384
385 if (!nvm_readable(sw))
386 return 0;
387
388
389
390
391
392
393 if (sw->config.vendor_id != PCI_VENDOR_ID_INTEL &&
394 sw->config.vendor_id != 0x8087) {
395 dev_info(&sw->dev,
396 "NVM format of vendor %#x is not known, disabling NVM upgrade\n",
397 sw->config.vendor_id);
398 return 0;
399 }
400
401 nvm = tb_nvm_alloc(&sw->dev);
402 if (IS_ERR(nvm))
403 return PTR_ERR(nvm);
404
405
406
407
408
409
410 if (!sw->safe_mode) {
411 u32 nvm_size, hdr_size;
412
413 ret = nvm_read(sw, NVM_FLASH_SIZE, &val, sizeof(val));
414 if (ret)
415 goto err_nvm;
416
417 hdr_size = sw->generation < 3 ? SZ_8K : SZ_16K;
418 nvm_size = (SZ_1M << (val & 7)) / 8;
419 nvm_size = (nvm_size - hdr_size) / 2;
420
421 ret = nvm_read(sw, NVM_VERSION, &val, sizeof(val));
422 if (ret)
423 goto err_nvm;
424
425 nvm->major = val >> 16;
426 nvm->minor = val >> 8;
427
428 ret = tb_nvm_add_active(nvm, nvm_size, tb_switch_nvm_read);
429 if (ret)
430 goto err_nvm;
431 }
432
433 if (!sw->no_nvm_upgrade) {
434 ret = tb_nvm_add_non_active(nvm, NVM_MAX_SIZE,
435 tb_switch_nvm_write);
436 if (ret)
437 goto err_nvm;
438 }
439
440 sw->nvm = nvm;
441 return 0;
442
443err_nvm:
444 tb_nvm_free(nvm);
445 return ret;
446}
447
448static void tb_switch_nvm_remove(struct tb_switch *sw)
449{
450 struct tb_nvm *nvm;
451
452 nvm = sw->nvm;
453 sw->nvm = NULL;
454
455 if (!nvm)
456 return;
457
458
459 if (!nvm->authenticating)
460 nvm_clear_auth_status(sw);
461
462 tb_nvm_free(nvm);
463}
464
465
466
467static const char *tb_port_type(const struct tb_regs_port_header *port)
468{
469 switch (port->type >> 16) {
470 case 0:
471 switch ((u8) port->type) {
472 case 0:
473 return "Inactive";
474 case 1:
475 return "Port";
476 case 2:
477 return "NHI";
478 default:
479 return "unknown";
480 }
481 case 0x2:
482 return "Ethernet";
483 case 0x8:
484 return "SATA";
485 case 0xe:
486 return "DP/HDMI";
487 case 0x10:
488 return "PCIe";
489 case 0x20:
490 return "USB";
491 default:
492 return "unknown";
493 }
494}
495
496static void tb_dump_port(struct tb *tb, const struct tb_port *port)
497{
498 const struct tb_regs_port_header *regs = &port->config;
499
500 tb_dbg(tb,
501 " Port %d: %x:%x (Revision: %d, TB Version: %d, Type: %s (%#x))\n",
502 regs->port_number, regs->vendor_id, regs->device_id,
503 regs->revision, regs->thunderbolt_version, tb_port_type(regs),
504 regs->type);
505 tb_dbg(tb, " Max hop id (in/out): %d/%d\n",
506 regs->max_in_hop_id, regs->max_out_hop_id);
507 tb_dbg(tb, " Max counters: %d\n", regs->max_counters);
508 tb_dbg(tb, " NFC Credits: %#x\n", regs->nfc_credits);
509 tb_dbg(tb, " Credits (total/control): %u/%u\n", port->total_credits,
510 port->ctl_credits);
511}
512
513
514
515
516
517
518
519
520
521int tb_port_state(struct tb_port *port)
522{
523 struct tb_cap_phy phy;
524 int res;
525 if (port->cap_phy == 0) {
526 tb_port_WARN(port, "does not have a PHY\n");
527 return -EINVAL;
528 }
529 res = tb_port_read(port, &phy, TB_CFG_PORT, port->cap_phy, 2);
530 if (res)
531 return res;
532 return phy.state;
533}
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged)
551{
552 int retries = 10;
553 int state;
554 if (!port->cap_phy) {
555 tb_port_WARN(port, "does not have PHY\n");
556 return -EINVAL;
557 }
558 if (tb_is_upstream_port(port)) {
559 tb_port_WARN(port, "is the upstream port\n");
560 return -EINVAL;
561 }
562
563 while (retries--) {
564 state = tb_port_state(port);
565 if (state < 0)
566 return state;
567 if (state == TB_PORT_DISABLED) {
568 tb_port_dbg(port, "is disabled (state: 0)\n");
569 return 0;
570 }
571 if (state == TB_PORT_UNPLUGGED) {
572 if (wait_if_unplugged) {
573
574 tb_port_dbg(port,
575 "is unplugged (state: 7), retrying...\n");
576 msleep(100);
577 continue;
578 }
579 tb_port_dbg(port, "is unplugged (state: 7)\n");
580 return 0;
581 }
582 if (state == TB_PORT_UP) {
583 tb_port_dbg(port, "is connected, link is up (state: 2)\n");
584 return 1;
585 }
586
587
588
589
590
591 tb_port_dbg(port,
592 "is connected, link is not up (state: %d), retrying...\n",
593 state);
594 msleep(100);
595 }
596 tb_port_warn(port,
597 "failed to reach state TB_PORT_UP. Ignoring port...\n");
598 return 0;
599}
600
601
602
603
604
605
606
607
608
609
610
611int tb_port_add_nfc_credits(struct tb_port *port, int credits)
612{
613 u32 nfc_credits;
614
615 if (credits == 0 || port->sw->is_unplugged)
616 return 0;
617
618
619
620
621
622 if (tb_switch_is_usb4(port->sw) && !tb_port_is_null(port))
623 return 0;
624
625 nfc_credits = port->config.nfc_credits & ADP_CS_4_NFC_BUFFERS_MASK;
626 nfc_credits += credits;
627
628 tb_port_dbg(port, "adding %d NFC credits to %lu", credits,
629 port->config.nfc_credits & ADP_CS_4_NFC_BUFFERS_MASK);
630
631 port->config.nfc_credits &= ~ADP_CS_4_NFC_BUFFERS_MASK;
632 port->config.nfc_credits |= nfc_credits;
633
634 return tb_port_write(port, &port->config.nfc_credits,
635 TB_CFG_PORT, ADP_CS_4, 1);
636}
637
638
639
640
641
642
643
644
645int tb_port_clear_counter(struct tb_port *port, int counter)
646{
647 u32 zero[3] = { 0, 0, 0 };
648 tb_port_dbg(port, "clearing counter %d\n", counter);
649 return tb_port_write(port, zero, TB_CFG_COUNTERS, 3 * counter, 3);
650}
651
652
653
654
655
656
657
658
659int tb_port_unlock(struct tb_port *port)
660{
661 if (tb_switch_is_icm(port->sw))
662 return 0;
663 if (!tb_port_is_null(port))
664 return -EINVAL;
665 if (tb_switch_is_usb4(port->sw))
666 return usb4_port_unlock(port);
667 return 0;
668}
669
670static int __tb_port_enable(struct tb_port *port, bool enable)
671{
672 int ret;
673 u32 phy;
674
675 if (!tb_port_is_null(port))
676 return -EINVAL;
677
678 ret = tb_port_read(port, &phy, TB_CFG_PORT,
679 port->cap_phy + LANE_ADP_CS_1, 1);
680 if (ret)
681 return ret;
682
683 if (enable)
684 phy &= ~LANE_ADP_CS_1_LD;
685 else
686 phy |= LANE_ADP_CS_1_LD;
687
688 return tb_port_write(port, &phy, TB_CFG_PORT,
689 port->cap_phy + LANE_ADP_CS_1, 1);
690}
691
692
693
694
695
696
697
698int tb_port_enable(struct tb_port *port)
699{
700 return __tb_port_enable(port, true);
701}
702
703
704
705
706
707
708
709int tb_port_disable(struct tb_port *port)
710{
711 return __tb_port_enable(port, false);
712}
713
714
715
716
717
718
719
720
721
722static int tb_init_port(struct tb_port *port)
723{
724 int res;
725 int cap;
726
727 INIT_LIST_HEAD(&port->list);
728
729
730 if (!port->port)
731 return 0;
732
733 res = tb_port_read(port, &port->config, TB_CFG_PORT, 0, 8);
734 if (res) {
735 if (res == -ENODEV) {
736 tb_dbg(port->sw->tb, " Port %d: not implemented\n",
737 port->port);
738 port->disabled = true;
739 return 0;
740 }
741 return res;
742 }
743
744
745 if (port->config.type == TB_TYPE_PORT) {
746 cap = tb_port_find_cap(port, TB_PORT_CAP_PHY);
747
748 if (cap > 0)
749 port->cap_phy = cap;
750 else
751 tb_port_WARN(port, "non switch port without a PHY\n");
752
753 cap = tb_port_find_cap(port, TB_PORT_CAP_USB4);
754 if (cap > 0)
755 port->cap_usb4 = cap;
756
757
758
759
760
761
762 if (tb_switch_is_usb4(port->sw)) {
763 struct tb_regs_hop hop;
764
765 if (!tb_port_read(port, &hop, TB_CFG_HOPS, 0, 2))
766 port->ctl_credits = hop.initial_credits;
767 }
768 if (!port->ctl_credits)
769 port->ctl_credits = 2;
770
771 } else {
772 cap = tb_port_find_cap(port, TB_PORT_CAP_ADAP);
773 if (cap > 0)
774 port->cap_adap = cap;
775 }
776
777 port->total_credits =
778 (port->config.nfc_credits & ADP_CS_4_TOTAL_BUFFERS_MASK) >>
779 ADP_CS_4_TOTAL_BUFFERS_SHIFT;
780
781 tb_dump_port(port->sw->tb, port);
782 return 0;
783}
784
785static int tb_port_alloc_hopid(struct tb_port *port, bool in, int min_hopid,
786 int max_hopid)
787{
788 int port_max_hopid;
789 struct ida *ida;
790
791 if (in) {
792 port_max_hopid = port->config.max_in_hop_id;
793 ida = &port->in_hopids;
794 } else {
795 port_max_hopid = port->config.max_out_hop_id;
796 ida = &port->out_hopids;
797 }
798
799
800
801
802
803 if (!tb_port_is_nhi(port) && min_hopid < TB_PATH_MIN_HOPID)
804 min_hopid = TB_PATH_MIN_HOPID;
805
806 if (max_hopid < 0 || max_hopid > port_max_hopid)
807 max_hopid = port_max_hopid;
808
809 return ida_simple_get(ida, min_hopid, max_hopid + 1, GFP_KERNEL);
810}
811
812
813
814
815
816
817
818
819
820
821int tb_port_alloc_in_hopid(struct tb_port *port, int min_hopid, int max_hopid)
822{
823 return tb_port_alloc_hopid(port, true, min_hopid, max_hopid);
824}
825
826
827
828
829
830
831
832
833
834
835int tb_port_alloc_out_hopid(struct tb_port *port, int min_hopid, int max_hopid)
836{
837 return tb_port_alloc_hopid(port, false, min_hopid, max_hopid);
838}
839
840
841
842
843
844
845void tb_port_release_in_hopid(struct tb_port *port, int hopid)
846{
847 ida_simple_remove(&port->in_hopids, hopid);
848}
849
850
851
852
853
854
855void tb_port_release_out_hopid(struct tb_port *port, int hopid)
856{
857 ida_simple_remove(&port->out_hopids, hopid);
858}
859
860static inline bool tb_switch_is_reachable(const struct tb_switch *parent,
861 const struct tb_switch *sw)
862{
863 u64 mask = (1ULL << parent->config.depth * 8) - 1;
864 return (tb_route(parent) & mask) == (tb_route(sw) & mask);
865}
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
883 struct tb_port *prev)
884{
885 struct tb_port *next;
886
887 if (!prev)
888 return start;
889
890 if (prev->sw == end->sw) {
891 if (prev == end)
892 return NULL;
893 return end;
894 }
895
896 if (tb_switch_is_reachable(prev->sw, end->sw)) {
897 next = tb_port_at(tb_route(end->sw), prev->sw);
898
899 if (prev->remote &&
900 (next == prev || next->dual_link_port == prev))
901 next = prev->remote;
902 } else {
903 if (tb_is_upstream_port(prev)) {
904 next = prev->remote;
905 } else {
906 next = tb_upstream_port(prev->sw);
907
908
909
910
911 if (next->dual_link_port &&
912 next->link_nr != prev->link_nr) {
913 next = next->dual_link_port;
914 }
915 }
916 }
917
918 return next != prev ? next : NULL;
919}
920
921
922
923
924
925
926
927int tb_port_get_link_speed(struct tb_port *port)
928{
929 u32 val, speed;
930 int ret;
931
932 if (!port->cap_phy)
933 return -EINVAL;
934
935 ret = tb_port_read(port, &val, TB_CFG_PORT,
936 port->cap_phy + LANE_ADP_CS_1, 1);
937 if (ret)
938 return ret;
939
940 speed = (val & LANE_ADP_CS_1_CURRENT_SPEED_MASK) >>
941 LANE_ADP_CS_1_CURRENT_SPEED_SHIFT;
942 return speed == LANE_ADP_CS_1_CURRENT_SPEED_GEN3 ? 20 : 10;
943}
944
945
946
947
948
949
950
951
952int tb_port_get_link_width(struct tb_port *port)
953{
954 u32 val;
955 int ret;
956
957 if (!port->cap_phy)
958 return -EINVAL;
959
960 ret = tb_port_read(port, &val, TB_CFG_PORT,
961 port->cap_phy + LANE_ADP_CS_1, 1);
962 if (ret)
963 return ret;
964
965 return (val & LANE_ADP_CS_1_CURRENT_WIDTH_MASK) >>
966 LANE_ADP_CS_1_CURRENT_WIDTH_SHIFT;
967}
968
969static bool tb_port_is_width_supported(struct tb_port *port, int width)
970{
971 u32 phy, widths;
972 int ret;
973
974 if (!port->cap_phy)
975 return false;
976
977 ret = tb_port_read(port, &phy, TB_CFG_PORT,
978 port->cap_phy + LANE_ADP_CS_0, 1);
979 if (ret)
980 return false;
981
982 widths = (phy & LANE_ADP_CS_0_SUPPORTED_WIDTH_MASK) >>
983 LANE_ADP_CS_0_SUPPORTED_WIDTH_SHIFT;
984
985 return !!(widths & width);
986}
987
988static int tb_port_set_link_width(struct tb_port *port, unsigned int width)
989{
990 u32 val;
991 int ret;
992
993 if (!port->cap_phy)
994 return -EINVAL;
995
996 ret = tb_port_read(port, &val, TB_CFG_PORT,
997 port->cap_phy + LANE_ADP_CS_1, 1);
998 if (ret)
999 return ret;
1000
1001 val &= ~LANE_ADP_CS_1_TARGET_WIDTH_MASK;
1002 switch (width) {
1003 case 1:
1004 val |= LANE_ADP_CS_1_TARGET_WIDTH_SINGLE <<
1005 LANE_ADP_CS_1_TARGET_WIDTH_SHIFT;
1006 break;
1007 case 2:
1008 val |= LANE_ADP_CS_1_TARGET_WIDTH_DUAL <<
1009 LANE_ADP_CS_1_TARGET_WIDTH_SHIFT;
1010 break;
1011 default:
1012 return -EINVAL;
1013 }
1014
1015 val |= LANE_ADP_CS_1_LB;
1016
1017 return tb_port_write(port, &val, TB_CFG_PORT,
1018 port->cap_phy + LANE_ADP_CS_1, 1);
1019}
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033int tb_port_lane_bonding_enable(struct tb_port *port)
1034{
1035 int ret;
1036
1037
1038
1039
1040
1041 ret = tb_port_get_link_width(port);
1042 if (ret == 1) {
1043 ret = tb_port_set_link_width(port, 2);
1044 if (ret)
1045 return ret;
1046 }
1047
1048 ret = tb_port_get_link_width(port->dual_link_port);
1049 if (ret == 1) {
1050 ret = tb_port_set_link_width(port->dual_link_port, 2);
1051 if (ret) {
1052 tb_port_set_link_width(port, 1);
1053 return ret;
1054 }
1055 }
1056
1057 port->bonded = true;
1058 port->dual_link_port->bonded = true;
1059
1060 return 0;
1061}
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071void tb_port_lane_bonding_disable(struct tb_port *port)
1072{
1073 port->dual_link_port->bonded = false;
1074 port->bonded = false;
1075
1076 tb_port_set_link_width(port->dual_link_port, 1);
1077 tb_port_set_link_width(port, 1);
1078}
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091int tb_port_wait_for_link_width(struct tb_port *port, int width,
1092 int timeout_msec)
1093{
1094 ktime_t timeout = ktime_add_ms(ktime_get(), timeout_msec);
1095 int ret;
1096
1097 do {
1098 ret = tb_port_get_link_width(port);
1099 if (ret < 0)
1100 return ret;
1101 else if (ret == width)
1102 return 0;
1103
1104 usleep_range(1000, 2000);
1105 } while (ktime_before(ktime_get(), timeout));
1106
1107 return -ETIMEDOUT;
1108}
1109
1110static int tb_port_do_update_credits(struct tb_port *port)
1111{
1112 u32 nfc_credits;
1113 int ret;
1114
1115 ret = tb_port_read(port, &nfc_credits, TB_CFG_PORT, ADP_CS_4, 1);
1116 if (ret)
1117 return ret;
1118
1119 if (nfc_credits != port->config.nfc_credits) {
1120 u32 total;
1121
1122 total = (nfc_credits & ADP_CS_4_TOTAL_BUFFERS_MASK) >>
1123 ADP_CS_4_TOTAL_BUFFERS_SHIFT;
1124
1125 tb_port_dbg(port, "total credits changed %u -> %u\n",
1126 port->total_credits, total);
1127
1128 port->config.nfc_credits = nfc_credits;
1129 port->total_credits = total;
1130 }
1131
1132 return 0;
1133}
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143int tb_port_update_credits(struct tb_port *port)
1144{
1145 int ret;
1146
1147 ret = tb_port_do_update_credits(port);
1148 if (ret)
1149 return ret;
1150 return tb_port_do_update_credits(port->dual_link_port);
1151}
1152
1153static int tb_port_start_lane_initialization(struct tb_port *port)
1154{
1155 int ret;
1156
1157 if (tb_switch_is_usb4(port->sw))
1158 return 0;
1159
1160 ret = tb_lc_start_lane_initialization(port);
1161 return ret == -EINVAL ? 0 : ret;
1162}
1163
1164
1165
1166
1167
1168static bool tb_port_resume(struct tb_port *port)
1169{
1170 bool has_remote = tb_port_has_remote(port);
1171
1172 if (port->usb4) {
1173 usb4_port_device_resume(port->usb4);
1174 } else if (!has_remote) {
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184 if (!tb_is_upstream_port(port) || port->xdomain)
1185 tb_port_start_lane_initialization(port);
1186 }
1187
1188 return has_remote || port->xdomain;
1189}
1190
1191
1192
1193
1194
1195bool tb_port_is_enabled(struct tb_port *port)
1196{
1197 switch (port->config.type) {
1198 case TB_TYPE_PCIE_UP:
1199 case TB_TYPE_PCIE_DOWN:
1200 return tb_pci_port_is_enabled(port);
1201
1202 case TB_TYPE_DP_HDMI_IN:
1203 case TB_TYPE_DP_HDMI_OUT:
1204 return tb_dp_port_is_enabled(port);
1205
1206 case TB_TYPE_USB3_UP:
1207 case TB_TYPE_USB3_DOWN:
1208 return tb_usb3_port_is_enabled(port);
1209
1210 default:
1211 return false;
1212 }
1213}
1214
1215
1216
1217
1218
1219bool tb_usb3_port_is_enabled(struct tb_port *port)
1220{
1221 u32 data;
1222
1223 if (tb_port_read(port, &data, TB_CFG_PORT,
1224 port->cap_adap + ADP_USB3_CS_0, 1))
1225 return false;
1226
1227 return !!(data & ADP_USB3_CS_0_PE);
1228}
1229
1230
1231
1232
1233
1234
1235int tb_usb3_port_enable(struct tb_port *port, bool enable)
1236{
1237 u32 word = enable ? (ADP_USB3_CS_0_PE | ADP_USB3_CS_0_V)
1238 : ADP_USB3_CS_0_V;
1239
1240 if (!port->cap_adap)
1241 return -ENXIO;
1242 return tb_port_write(port, &word, TB_CFG_PORT,
1243 port->cap_adap + ADP_USB3_CS_0, 1);
1244}
1245
1246
1247
1248
1249
1250bool tb_pci_port_is_enabled(struct tb_port *port)
1251{
1252 u32 data;
1253
1254 if (tb_port_read(port, &data, TB_CFG_PORT,
1255 port->cap_adap + ADP_PCIE_CS_0, 1))
1256 return false;
1257
1258 return !!(data & ADP_PCIE_CS_0_PE);
1259}
1260
1261
1262
1263
1264
1265
1266int tb_pci_port_enable(struct tb_port *port, bool enable)
1267{
1268 u32 word = enable ? ADP_PCIE_CS_0_PE : 0x0;
1269 if (!port->cap_adap)
1270 return -ENXIO;
1271 return tb_port_write(port, &word, TB_CFG_PORT,
1272 port->cap_adap + ADP_PCIE_CS_0, 1);
1273}
1274
1275
1276
1277
1278
1279
1280
1281int tb_dp_port_hpd_is_active(struct tb_port *port)
1282{
1283 u32 data;
1284 int ret;
1285
1286 ret = tb_port_read(port, &data, TB_CFG_PORT,
1287 port->cap_adap + ADP_DP_CS_2, 1);
1288 if (ret)
1289 return ret;
1290
1291 return !!(data & ADP_DP_CS_2_HDP);
1292}
1293
1294
1295
1296
1297
1298
1299
1300int tb_dp_port_hpd_clear(struct tb_port *port)
1301{
1302 u32 data;
1303 int ret;
1304
1305 ret = tb_port_read(port, &data, TB_CFG_PORT,
1306 port->cap_adap + ADP_DP_CS_3, 1);
1307 if (ret)
1308 return ret;
1309
1310 data |= ADP_DP_CS_3_HDPC;
1311 return tb_port_write(port, &data, TB_CFG_PORT,
1312 port->cap_adap + ADP_DP_CS_3, 1);
1313}
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324int tb_dp_port_set_hops(struct tb_port *port, unsigned int video,
1325 unsigned int aux_tx, unsigned int aux_rx)
1326{
1327 u32 data[2];
1328 int ret;
1329
1330 ret = tb_port_read(port, data, TB_CFG_PORT,
1331 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1332 if (ret)
1333 return ret;
1334
1335 data[0] &= ~ADP_DP_CS_0_VIDEO_HOPID_MASK;
1336 data[1] &= ~ADP_DP_CS_1_AUX_RX_HOPID_MASK;
1337 data[1] &= ~ADP_DP_CS_1_AUX_RX_HOPID_MASK;
1338
1339 data[0] |= (video << ADP_DP_CS_0_VIDEO_HOPID_SHIFT) &
1340 ADP_DP_CS_0_VIDEO_HOPID_MASK;
1341 data[1] |= aux_tx & ADP_DP_CS_1_AUX_TX_HOPID_MASK;
1342 data[1] |= (aux_rx << ADP_DP_CS_1_AUX_RX_HOPID_SHIFT) &
1343 ADP_DP_CS_1_AUX_RX_HOPID_MASK;
1344
1345 return tb_port_write(port, data, TB_CFG_PORT,
1346 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1347}
1348
1349
1350
1351
1352
1353bool tb_dp_port_is_enabled(struct tb_port *port)
1354{
1355 u32 data[2];
1356
1357 if (tb_port_read(port, data, TB_CFG_PORT, port->cap_adap + ADP_DP_CS_0,
1358 ARRAY_SIZE(data)))
1359 return false;
1360
1361 return !!(data[0] & (ADP_DP_CS_0_VE | ADP_DP_CS_0_AE));
1362}
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372int tb_dp_port_enable(struct tb_port *port, bool enable)
1373{
1374 u32 data[2];
1375 int ret;
1376
1377 ret = tb_port_read(port, data, TB_CFG_PORT,
1378 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1379 if (ret)
1380 return ret;
1381
1382 if (enable)
1383 data[0] |= ADP_DP_CS_0_VE | ADP_DP_CS_0_AE;
1384 else
1385 data[0] &= ~(ADP_DP_CS_0_VE | ADP_DP_CS_0_AE);
1386
1387 return tb_port_write(port, data, TB_CFG_PORT,
1388 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1389}
1390
1391
1392
1393static const char *tb_switch_generation_name(const struct tb_switch *sw)
1394{
1395 switch (sw->generation) {
1396 case 1:
1397 return "Thunderbolt 1";
1398 case 2:
1399 return "Thunderbolt 2";
1400 case 3:
1401 return "Thunderbolt 3";
1402 case 4:
1403 return "USB4";
1404 default:
1405 return "Unknown";
1406 }
1407}
1408
1409static void tb_dump_switch(const struct tb *tb, const struct tb_switch *sw)
1410{
1411 const struct tb_regs_switch_header *regs = &sw->config;
1412
1413 tb_dbg(tb, " %s Switch: %x:%x (Revision: %d, TB Version: %d)\n",
1414 tb_switch_generation_name(sw), regs->vendor_id, regs->device_id,
1415 regs->revision, regs->thunderbolt_version);
1416 tb_dbg(tb, " Max Port Number: %d\n", regs->max_port_number);
1417 tb_dbg(tb, " Config:\n");
1418 tb_dbg(tb,
1419 " Upstream Port Number: %d Depth: %d Route String: %#llx Enabled: %d, PlugEventsDelay: %dms\n",
1420 regs->upstream_port_number, regs->depth,
1421 (((u64) regs->route_hi) << 32) | regs->route_lo,
1422 regs->enabled, regs->plug_events_delay);
1423 tb_dbg(tb, " unknown1: %#x unknown4: %#x\n",
1424 regs->__unknown1, regs->__unknown4);
1425}
1426
1427
1428
1429
1430
1431
1432
1433int tb_switch_reset(struct tb_switch *sw)
1434{
1435 struct tb_cfg_result res;
1436
1437 if (sw->generation > 1)
1438 return 0;
1439
1440 tb_sw_dbg(sw, "resetting switch\n");
1441
1442 res.err = tb_sw_write(sw, ((u32 *) &sw->config) + 2,
1443 TB_CFG_SWITCH, 2, 2);
1444 if (res.err)
1445 return res.err;
1446 res = tb_cfg_reset(sw->tb->ctl, tb_route(sw));
1447 if (res.err > 0)
1448 return -EIO;
1449 return res.err;
1450}
1451
1452
1453
1454
1455
1456
1457
1458
1459static int tb_plug_events_active(struct tb_switch *sw, bool active)
1460{
1461 u32 data;
1462 int res;
1463
1464 if (tb_switch_is_icm(sw) || tb_switch_is_usb4(sw))
1465 return 0;
1466
1467 sw->config.plug_events_delay = 0xff;
1468 res = tb_sw_write(sw, ((u32 *) &sw->config) + 4, TB_CFG_SWITCH, 4, 1);
1469 if (res)
1470 return res;
1471
1472 res = tb_sw_read(sw, &data, TB_CFG_SWITCH, sw->cap_plug_events + 1, 1);
1473 if (res)
1474 return res;
1475
1476 if (active) {
1477 data = data & 0xFFFFFF83;
1478 switch (sw->config.device_id) {
1479 case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE:
1480 case PCI_DEVICE_ID_INTEL_EAGLE_RIDGE:
1481 case PCI_DEVICE_ID_INTEL_PORT_RIDGE:
1482 break;
1483 default:
1484 data |= 4;
1485 }
1486 } else {
1487 data = data | 0x7c;
1488 }
1489 return tb_sw_write(sw, &data, TB_CFG_SWITCH,
1490 sw->cap_plug_events + 1, 1);
1491}
1492
1493static ssize_t authorized_show(struct device *dev,
1494 struct device_attribute *attr,
1495 char *buf)
1496{
1497 struct tb_switch *sw = tb_to_switch(dev);
1498
1499 return sprintf(buf, "%u\n", sw->authorized);
1500}
1501
1502static int disapprove_switch(struct device *dev, void *not_used)
1503{
1504 char *envp[] = { "AUTHORIZED=0", NULL };
1505 struct tb_switch *sw;
1506
1507 sw = tb_to_switch(dev);
1508 if (sw && sw->authorized) {
1509 int ret;
1510
1511
1512 ret = device_for_each_child_reverse(&sw->dev, NULL, disapprove_switch);
1513 if (ret)
1514 return ret;
1515
1516 ret = tb_domain_disapprove_switch(sw->tb, sw);
1517 if (ret)
1518 return ret;
1519
1520 sw->authorized = 0;
1521 kobject_uevent_env(&sw->dev.kobj, KOBJ_CHANGE, envp);
1522 }
1523
1524 return 0;
1525}
1526
1527static int tb_switch_set_authorized(struct tb_switch *sw, unsigned int val)
1528{
1529 char envp_string[13];
1530 int ret = -EINVAL;
1531 char *envp[] = { envp_string, NULL };
1532
1533 if (!mutex_trylock(&sw->tb->lock))
1534 return restart_syscall();
1535
1536 if (!!sw->authorized == !!val)
1537 goto unlock;
1538
1539 switch (val) {
1540
1541 case 0:
1542 if (tb_route(sw)) {
1543 ret = disapprove_switch(&sw->dev, NULL);
1544 goto unlock;
1545 }
1546 break;
1547
1548
1549 case 1:
1550 if (sw->key)
1551 ret = tb_domain_approve_switch_key(sw->tb, sw);
1552 else
1553 ret = tb_domain_approve_switch(sw->tb, sw);
1554 break;
1555
1556
1557 case 2:
1558 if (sw->key)
1559 ret = tb_domain_challenge_switch_key(sw->tb, sw);
1560 break;
1561
1562 default:
1563 break;
1564 }
1565
1566 if (!ret) {
1567 sw->authorized = val;
1568
1569
1570
1571
1572 sprintf(envp_string, "AUTHORIZED=%u", sw->authorized);
1573 kobject_uevent_env(&sw->dev.kobj, KOBJ_CHANGE, envp);
1574 }
1575
1576unlock:
1577 mutex_unlock(&sw->tb->lock);
1578 return ret;
1579}
1580
1581static ssize_t authorized_store(struct device *dev,
1582 struct device_attribute *attr,
1583 const char *buf, size_t count)
1584{
1585 struct tb_switch *sw = tb_to_switch(dev);
1586 unsigned int val;
1587 ssize_t ret;
1588
1589 ret = kstrtouint(buf, 0, &val);
1590 if (ret)
1591 return ret;
1592 if (val > 2)
1593 return -EINVAL;
1594
1595 pm_runtime_get_sync(&sw->dev);
1596 ret = tb_switch_set_authorized(sw, val);
1597 pm_runtime_mark_last_busy(&sw->dev);
1598 pm_runtime_put_autosuspend(&sw->dev);
1599
1600 return ret ? ret : count;
1601}
1602static DEVICE_ATTR_RW(authorized);
1603
1604static ssize_t boot_show(struct device *dev, struct device_attribute *attr,
1605 char *buf)
1606{
1607 struct tb_switch *sw = tb_to_switch(dev);
1608
1609 return sprintf(buf, "%u\n", sw->boot);
1610}
1611static DEVICE_ATTR_RO(boot);
1612
1613static ssize_t device_show(struct device *dev, struct device_attribute *attr,
1614 char *buf)
1615{
1616 struct tb_switch *sw = tb_to_switch(dev);
1617
1618 return sprintf(buf, "%#x\n", sw->device);
1619}
1620static DEVICE_ATTR_RO(device);
1621
1622static ssize_t
1623device_name_show(struct device *dev, struct device_attribute *attr, char *buf)
1624{
1625 struct tb_switch *sw = tb_to_switch(dev);
1626
1627 return sprintf(buf, "%s\n", sw->device_name ? sw->device_name : "");
1628}
1629static DEVICE_ATTR_RO(device_name);
1630
1631static ssize_t
1632generation_show(struct device *dev, struct device_attribute *attr, char *buf)
1633{
1634 struct tb_switch *sw = tb_to_switch(dev);
1635
1636 return sprintf(buf, "%u\n", sw->generation);
1637}
1638static DEVICE_ATTR_RO(generation);
1639
1640static ssize_t key_show(struct device *dev, struct device_attribute *attr,
1641 char *buf)
1642{
1643 struct tb_switch *sw = tb_to_switch(dev);
1644 ssize_t ret;
1645
1646 if (!mutex_trylock(&sw->tb->lock))
1647 return restart_syscall();
1648
1649 if (sw->key)
1650 ret = sprintf(buf, "%*phN\n", TB_SWITCH_KEY_SIZE, sw->key);
1651 else
1652 ret = sprintf(buf, "\n");
1653
1654 mutex_unlock(&sw->tb->lock);
1655 return ret;
1656}
1657
1658static ssize_t key_store(struct device *dev, struct device_attribute *attr,
1659 const char *buf, size_t count)
1660{
1661 struct tb_switch *sw = tb_to_switch(dev);
1662 u8 key[TB_SWITCH_KEY_SIZE];
1663 ssize_t ret = count;
1664 bool clear = false;
1665
1666 if (!strcmp(buf, "\n"))
1667 clear = true;
1668 else if (hex2bin(key, buf, sizeof(key)))
1669 return -EINVAL;
1670
1671 if (!mutex_trylock(&sw->tb->lock))
1672 return restart_syscall();
1673
1674 if (sw->authorized) {
1675 ret = -EBUSY;
1676 } else {
1677 kfree(sw->key);
1678 if (clear) {
1679 sw->key = NULL;
1680 } else {
1681 sw->key = kmemdup(key, sizeof(key), GFP_KERNEL);
1682 if (!sw->key)
1683 ret = -ENOMEM;
1684 }
1685 }
1686
1687 mutex_unlock(&sw->tb->lock);
1688 return ret;
1689}
1690static DEVICE_ATTR(key, 0600, key_show, key_store);
1691
1692static ssize_t speed_show(struct device *dev, struct device_attribute *attr,
1693 char *buf)
1694{
1695 struct tb_switch *sw = tb_to_switch(dev);
1696
1697 return sprintf(buf, "%u.0 Gb/s\n", sw->link_speed);
1698}
1699
1700
1701
1702
1703
1704static DEVICE_ATTR(rx_speed, 0444, speed_show, NULL);
1705static DEVICE_ATTR(tx_speed, 0444, speed_show, NULL);
1706
1707static ssize_t lanes_show(struct device *dev, struct device_attribute *attr,
1708 char *buf)
1709{
1710 struct tb_switch *sw = tb_to_switch(dev);
1711
1712 return sprintf(buf, "%u\n", sw->link_width);
1713}
1714
1715
1716
1717
1718
1719static DEVICE_ATTR(rx_lanes, 0444, lanes_show, NULL);
1720static DEVICE_ATTR(tx_lanes, 0444, lanes_show, NULL);
1721
1722static ssize_t nvm_authenticate_show(struct device *dev,
1723 struct device_attribute *attr, char *buf)
1724{
1725 struct tb_switch *sw = tb_to_switch(dev);
1726 u32 status;
1727
1728 nvm_get_auth_status(sw, &status);
1729 return sprintf(buf, "%#x\n", status);
1730}
1731
1732static ssize_t nvm_authenticate_sysfs(struct device *dev, const char *buf,
1733 bool disconnect)
1734{
1735 struct tb_switch *sw = tb_to_switch(dev);
1736 int val, ret;
1737
1738 pm_runtime_get_sync(&sw->dev);
1739
1740 if (!mutex_trylock(&sw->tb->lock)) {
1741 ret = restart_syscall();
1742 goto exit_rpm;
1743 }
1744
1745
1746 if (!sw->nvm) {
1747 ret = -EAGAIN;
1748 goto exit_unlock;
1749 }
1750
1751 ret = kstrtoint(buf, 10, &val);
1752 if (ret)
1753 goto exit_unlock;
1754
1755
1756 nvm_clear_auth_status(sw);
1757
1758 if (val > 0) {
1759 if (val == AUTHENTICATE_ONLY) {
1760 if (disconnect)
1761 ret = -EINVAL;
1762 else
1763 ret = nvm_authenticate(sw, true);
1764 } else {
1765 if (!sw->nvm->flushed) {
1766 if (!sw->nvm->buf) {
1767 ret = -EINVAL;
1768 goto exit_unlock;
1769 }
1770
1771 ret = nvm_validate_and_write(sw);
1772 if (ret || val == WRITE_ONLY)
1773 goto exit_unlock;
1774 }
1775 if (val == WRITE_AND_AUTHENTICATE) {
1776 if (disconnect)
1777 ret = tb_lc_force_power(sw);
1778 else
1779 ret = nvm_authenticate(sw, false);
1780 }
1781 }
1782 }
1783
1784exit_unlock:
1785 mutex_unlock(&sw->tb->lock);
1786exit_rpm:
1787 pm_runtime_mark_last_busy(&sw->dev);
1788 pm_runtime_put_autosuspend(&sw->dev);
1789
1790 return ret;
1791}
1792
1793static ssize_t nvm_authenticate_store(struct device *dev,
1794 struct device_attribute *attr, const char *buf, size_t count)
1795{
1796 int ret = nvm_authenticate_sysfs(dev, buf, false);
1797 if (ret)
1798 return ret;
1799 return count;
1800}
1801static DEVICE_ATTR_RW(nvm_authenticate);
1802
1803static ssize_t nvm_authenticate_on_disconnect_show(struct device *dev,
1804 struct device_attribute *attr, char *buf)
1805{
1806 return nvm_authenticate_show(dev, attr, buf);
1807}
1808
1809static ssize_t nvm_authenticate_on_disconnect_store(struct device *dev,
1810 struct device_attribute *attr, const char *buf, size_t count)
1811{
1812 int ret;
1813
1814 ret = nvm_authenticate_sysfs(dev, buf, true);
1815 return ret ? ret : count;
1816}
1817static DEVICE_ATTR_RW(nvm_authenticate_on_disconnect);
1818
1819static ssize_t nvm_version_show(struct device *dev,
1820 struct device_attribute *attr, char *buf)
1821{
1822 struct tb_switch *sw = tb_to_switch(dev);
1823 int ret;
1824
1825 if (!mutex_trylock(&sw->tb->lock))
1826 return restart_syscall();
1827
1828 if (sw->safe_mode)
1829 ret = -ENODATA;
1830 else if (!sw->nvm)
1831 ret = -EAGAIN;
1832 else
1833 ret = sprintf(buf, "%x.%x\n", sw->nvm->major, sw->nvm->minor);
1834
1835 mutex_unlock(&sw->tb->lock);
1836
1837 return ret;
1838}
1839static DEVICE_ATTR_RO(nvm_version);
1840
1841static ssize_t vendor_show(struct device *dev, struct device_attribute *attr,
1842 char *buf)
1843{
1844 struct tb_switch *sw = tb_to_switch(dev);
1845
1846 return sprintf(buf, "%#x\n", sw->vendor);
1847}
1848static DEVICE_ATTR_RO(vendor);
1849
1850static ssize_t
1851vendor_name_show(struct device *dev, struct device_attribute *attr, char *buf)
1852{
1853 struct tb_switch *sw = tb_to_switch(dev);
1854
1855 return sprintf(buf, "%s\n", sw->vendor_name ? sw->vendor_name : "");
1856}
1857static DEVICE_ATTR_RO(vendor_name);
1858
1859static ssize_t unique_id_show(struct device *dev, struct device_attribute *attr,
1860 char *buf)
1861{
1862 struct tb_switch *sw = tb_to_switch(dev);
1863
1864 return sprintf(buf, "%pUb\n", sw->uuid);
1865}
1866static DEVICE_ATTR_RO(unique_id);
1867
1868static struct attribute *switch_attrs[] = {
1869 &dev_attr_authorized.attr,
1870 &dev_attr_boot.attr,
1871 &dev_attr_device.attr,
1872 &dev_attr_device_name.attr,
1873 &dev_attr_generation.attr,
1874 &dev_attr_key.attr,
1875 &dev_attr_nvm_authenticate.attr,
1876 &dev_attr_nvm_authenticate_on_disconnect.attr,
1877 &dev_attr_nvm_version.attr,
1878 &dev_attr_rx_speed.attr,
1879 &dev_attr_rx_lanes.attr,
1880 &dev_attr_tx_speed.attr,
1881 &dev_attr_tx_lanes.attr,
1882 &dev_attr_vendor.attr,
1883 &dev_attr_vendor_name.attr,
1884 &dev_attr_unique_id.attr,
1885 NULL,
1886};
1887
1888static umode_t switch_attr_is_visible(struct kobject *kobj,
1889 struct attribute *attr, int n)
1890{
1891 struct device *dev = kobj_to_dev(kobj);
1892 struct tb_switch *sw = tb_to_switch(dev);
1893
1894 if (attr == &dev_attr_authorized.attr) {
1895 if (sw->tb->security_level == TB_SECURITY_NOPCIE ||
1896 sw->tb->security_level == TB_SECURITY_DPONLY)
1897 return 0;
1898 } else if (attr == &dev_attr_device.attr) {
1899 if (!sw->device)
1900 return 0;
1901 } else if (attr == &dev_attr_device_name.attr) {
1902 if (!sw->device_name)
1903 return 0;
1904 } else if (attr == &dev_attr_vendor.attr) {
1905 if (!sw->vendor)
1906 return 0;
1907 } else if (attr == &dev_attr_vendor_name.attr) {
1908 if (!sw->vendor_name)
1909 return 0;
1910 } else if (attr == &dev_attr_key.attr) {
1911 if (tb_route(sw) &&
1912 sw->tb->security_level == TB_SECURITY_SECURE &&
1913 sw->security_level == TB_SECURITY_SECURE)
1914 return attr->mode;
1915 return 0;
1916 } else if (attr == &dev_attr_rx_speed.attr ||
1917 attr == &dev_attr_rx_lanes.attr ||
1918 attr == &dev_attr_tx_speed.attr ||
1919 attr == &dev_attr_tx_lanes.attr) {
1920 if (tb_route(sw))
1921 return attr->mode;
1922 return 0;
1923 } else if (attr == &dev_attr_nvm_authenticate.attr) {
1924 if (nvm_upgradeable(sw))
1925 return attr->mode;
1926 return 0;
1927 } else if (attr == &dev_attr_nvm_version.attr) {
1928 if (nvm_readable(sw))
1929 return attr->mode;
1930 return 0;
1931 } else if (attr == &dev_attr_boot.attr) {
1932 if (tb_route(sw))
1933 return attr->mode;
1934 return 0;
1935 } else if (attr == &dev_attr_nvm_authenticate_on_disconnect.attr) {
1936 if (sw->quirks & QUIRK_FORCE_POWER_LINK_CONTROLLER)
1937 return attr->mode;
1938 return 0;
1939 }
1940
1941 return sw->safe_mode ? 0 : attr->mode;
1942}
1943
1944static const struct attribute_group switch_group = {
1945 .is_visible = switch_attr_is_visible,
1946 .attrs = switch_attrs,
1947};
1948
1949static const struct attribute_group *switch_groups[] = {
1950 &switch_group,
1951 NULL,
1952};
1953
1954static void tb_switch_release(struct device *dev)
1955{
1956 struct tb_switch *sw = tb_to_switch(dev);
1957 struct tb_port *port;
1958
1959 dma_port_free(sw->dma_port);
1960
1961 tb_switch_for_each_port(sw, port) {
1962 ida_destroy(&port->in_hopids);
1963 ida_destroy(&port->out_hopids);
1964 }
1965
1966 kfree(sw->uuid);
1967 kfree(sw->device_name);
1968 kfree(sw->vendor_name);
1969 kfree(sw->ports);
1970 kfree(sw->drom);
1971 kfree(sw->key);
1972 kfree(sw);
1973}
1974
1975static int tb_switch_uevent(struct device *dev, struct kobj_uevent_env *env)
1976{
1977 struct tb_switch *sw = tb_to_switch(dev);
1978 const char *type;
1979
1980 if (sw->config.thunderbolt_version == USB4_VERSION_1_0) {
1981 if (add_uevent_var(env, "USB4_VERSION=1.0"))
1982 return -ENOMEM;
1983 }
1984
1985 if (!tb_route(sw)) {
1986 type = "host";
1987 } else {
1988 const struct tb_port *port;
1989 bool hub = false;
1990
1991
1992 tb_switch_for_each_port(sw, port) {
1993 if (!port->disabled && !tb_is_upstream_port(port) &&
1994 tb_port_is_null(port)) {
1995 hub = true;
1996 break;
1997 }
1998 }
1999
2000 type = hub ? "hub" : "device";
2001 }
2002
2003 if (add_uevent_var(env, "USB4_TYPE=%s", type))
2004 return -ENOMEM;
2005 return 0;
2006}
2007
2008
2009
2010
2011
2012static int __maybe_unused tb_switch_runtime_suspend(struct device *dev)
2013{
2014 struct tb_switch *sw = tb_to_switch(dev);
2015 const struct tb_cm_ops *cm_ops = sw->tb->cm_ops;
2016
2017 if (cm_ops->runtime_suspend_switch)
2018 return cm_ops->runtime_suspend_switch(sw);
2019
2020 return 0;
2021}
2022
2023static int __maybe_unused tb_switch_runtime_resume(struct device *dev)
2024{
2025 struct tb_switch *sw = tb_to_switch(dev);
2026 const struct tb_cm_ops *cm_ops = sw->tb->cm_ops;
2027
2028 if (cm_ops->runtime_resume_switch)
2029 return cm_ops->runtime_resume_switch(sw);
2030 return 0;
2031}
2032
2033static const struct dev_pm_ops tb_switch_pm_ops = {
2034 SET_RUNTIME_PM_OPS(tb_switch_runtime_suspend, tb_switch_runtime_resume,
2035 NULL)
2036};
2037
2038struct device_type tb_switch_type = {
2039 .name = "thunderbolt_device",
2040 .release = tb_switch_release,
2041 .uevent = tb_switch_uevent,
2042 .pm = &tb_switch_pm_ops,
2043};
2044
2045static int tb_switch_get_generation(struct tb_switch *sw)
2046{
2047 switch (sw->config.device_id) {
2048 case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE:
2049 case PCI_DEVICE_ID_INTEL_EAGLE_RIDGE:
2050 case PCI_DEVICE_ID_INTEL_LIGHT_PEAK:
2051 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C:
2052 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C:
2053 case PCI_DEVICE_ID_INTEL_PORT_RIDGE:
2054 case PCI_DEVICE_ID_INTEL_REDWOOD_RIDGE_2C_BRIDGE:
2055 case PCI_DEVICE_ID_INTEL_REDWOOD_RIDGE_4C_BRIDGE:
2056 return 1;
2057
2058 case PCI_DEVICE_ID_INTEL_WIN_RIDGE_2C_BRIDGE:
2059 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE:
2060 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE:
2061 return 2;
2062
2063 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
2064 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
2065 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE:
2066 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
2067 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
2068 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_BRIDGE:
2069 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_BRIDGE:
2070 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_BRIDGE:
2071 case PCI_DEVICE_ID_INTEL_ICL_NHI0:
2072 case PCI_DEVICE_ID_INTEL_ICL_NHI1:
2073 return 3;
2074
2075 default:
2076 if (tb_switch_is_usb4(sw))
2077 return 4;
2078
2079
2080
2081
2082
2083 tb_sw_warn(sw, "unsupported switch device id %#x\n",
2084 sw->config.device_id);
2085 return 1;
2086 }
2087}
2088
2089static bool tb_switch_exceeds_max_depth(const struct tb_switch *sw, int depth)
2090{
2091 int max_depth;
2092
2093 if (tb_switch_is_usb4(sw) ||
2094 (sw->tb->root_switch && tb_switch_is_usb4(sw->tb->root_switch)))
2095 max_depth = USB4_SWITCH_MAX_DEPTH;
2096 else
2097 max_depth = TB_SWITCH_MAX_DEPTH;
2098
2099 return depth > max_depth;
2100}
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
2117 u64 route)
2118{
2119 struct tb_switch *sw;
2120 int upstream_port;
2121 int i, ret, depth;
2122
2123
2124 if (route) {
2125 struct tb_switch *parent_sw = tb_to_switch(parent);
2126 struct tb_port *down;
2127
2128 down = tb_port_at(route, parent_sw);
2129 tb_port_unlock(down);
2130 }
2131
2132 depth = tb_route_length(route);
2133
2134 upstream_port = tb_cfg_get_upstream_port(tb->ctl, route);
2135 if (upstream_port < 0)
2136 return ERR_PTR(upstream_port);
2137
2138 sw = kzalloc(sizeof(*sw), GFP_KERNEL);
2139 if (!sw)
2140 return ERR_PTR(-ENOMEM);
2141
2142 sw->tb = tb;
2143 ret = tb_cfg_read(tb->ctl, &sw->config, route, 0, TB_CFG_SWITCH, 0, 5);
2144 if (ret)
2145 goto err_free_sw_ports;
2146
2147 sw->generation = tb_switch_get_generation(sw);
2148
2149 tb_dbg(tb, "current switch config:\n");
2150 tb_dump_switch(tb, sw);
2151
2152
2153 sw->config.upstream_port_number = upstream_port;
2154 sw->config.depth = depth;
2155 sw->config.route_hi = upper_32_bits(route);
2156 sw->config.route_lo = lower_32_bits(route);
2157 sw->config.enabled = 0;
2158
2159
2160 if (tb_switch_exceeds_max_depth(sw, depth)) {
2161 ret = -EADDRNOTAVAIL;
2162 goto err_free_sw_ports;
2163 }
2164
2165
2166 sw->ports = kcalloc(sw->config.max_port_number + 1, sizeof(*sw->ports),
2167 GFP_KERNEL);
2168 if (!sw->ports) {
2169 ret = -ENOMEM;
2170 goto err_free_sw_ports;
2171 }
2172
2173 for (i = 0; i <= sw->config.max_port_number; i++) {
2174
2175 sw->ports[i].sw = sw;
2176 sw->ports[i].port = i;
2177
2178
2179 if (i) {
2180 ida_init(&sw->ports[i].in_hopids);
2181 ida_init(&sw->ports[i].out_hopids);
2182 }
2183 }
2184
2185 ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_PLUG_EVENTS);
2186 if (ret > 0)
2187 sw->cap_plug_events = ret;
2188
2189 ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_LINK_CONTROLLER);
2190 if (ret > 0)
2191 sw->cap_lc = ret;
2192
2193
2194 if (!route)
2195 sw->authorized = true;
2196
2197 device_initialize(&sw->dev);
2198 sw->dev.parent = parent;
2199 sw->dev.bus = &tb_bus_type;
2200 sw->dev.type = &tb_switch_type;
2201 sw->dev.groups = switch_groups;
2202 dev_set_name(&sw->dev, "%u-%llx", tb->index, tb_route(sw));
2203
2204 return sw;
2205
2206err_free_sw_ports:
2207 kfree(sw->ports);
2208 kfree(sw);
2209
2210 return ERR_PTR(ret);
2211}
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227struct tb_switch *
2228tb_switch_alloc_safe_mode(struct tb *tb, struct device *parent, u64 route)
2229{
2230 struct tb_switch *sw;
2231
2232 sw = kzalloc(sizeof(*sw), GFP_KERNEL);
2233 if (!sw)
2234 return ERR_PTR(-ENOMEM);
2235
2236 sw->tb = tb;
2237 sw->config.depth = tb_route_length(route);
2238 sw->config.route_hi = upper_32_bits(route);
2239 sw->config.route_lo = lower_32_bits(route);
2240 sw->safe_mode = true;
2241
2242 device_initialize(&sw->dev);
2243 sw->dev.parent = parent;
2244 sw->dev.bus = &tb_bus_type;
2245 sw->dev.type = &tb_switch_type;
2246 sw->dev.groups = switch_groups;
2247 dev_set_name(&sw->dev, "%u-%llx", tb->index, tb_route(sw));
2248
2249 return sw;
2250}
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263int tb_switch_configure(struct tb_switch *sw)
2264{
2265 struct tb *tb = sw->tb;
2266 u64 route;
2267 int ret;
2268
2269 route = tb_route(sw);
2270
2271 tb_dbg(tb, "%s Switch at %#llx (depth: %d, up port: %d)\n",
2272 sw->config.enabled ? "restoring" : "initializing", route,
2273 tb_route_length(route), sw->config.upstream_port_number);
2274
2275 sw->config.enabled = 1;
2276
2277 if (tb_switch_is_usb4(sw)) {
2278
2279
2280
2281
2282
2283 sw->config.cmuv = USB4_VERSION_1_0;
2284
2285
2286 ret = tb_sw_write(sw, (u32 *)&sw->config + 1, TB_CFG_SWITCH,
2287 ROUTER_CS_1, 4);
2288 if (ret)
2289 return ret;
2290
2291 ret = usb4_switch_setup(sw);
2292 } else {
2293 if (sw->config.vendor_id != PCI_VENDOR_ID_INTEL)
2294 tb_sw_warn(sw, "unknown switch vendor id %#x\n",
2295 sw->config.vendor_id);
2296
2297 if (!sw->cap_plug_events) {
2298 tb_sw_warn(sw, "cannot find TB_VSE_CAP_PLUG_EVENTS aborting\n");
2299 return -ENODEV;
2300 }
2301
2302
2303 ret = tb_sw_write(sw, (u32 *)&sw->config + 1, TB_CFG_SWITCH,
2304 ROUTER_CS_1, 3);
2305 }
2306 if (ret)
2307 return ret;
2308
2309 return tb_plug_events_active(sw, true);
2310}
2311
2312static int tb_switch_set_uuid(struct tb_switch *sw)
2313{
2314 bool uid = false;
2315 u32 uuid[4];
2316 int ret;
2317
2318 if (sw->uuid)
2319 return 0;
2320
2321 if (tb_switch_is_usb4(sw)) {
2322 ret = usb4_switch_read_uid(sw, &sw->uid);
2323 if (ret)
2324 return ret;
2325 uid = true;
2326 } else {
2327
2328
2329
2330
2331 ret = tb_lc_read_uuid(sw, uuid);
2332 if (ret) {
2333 if (ret != -EINVAL)
2334 return ret;
2335 uid = true;
2336 }
2337 }
2338
2339 if (uid) {
2340
2341
2342
2343
2344
2345
2346 uuid[0] = sw->uid & 0xffffffff;
2347 uuid[1] = (sw->uid >> 32) & 0xffffffff;
2348 uuid[2] = 0xffffffff;
2349 uuid[3] = 0xffffffff;
2350 }
2351
2352 sw->uuid = kmemdup(uuid, sizeof(uuid), GFP_KERNEL);
2353 if (!sw->uuid)
2354 return -ENOMEM;
2355 return 0;
2356}
2357
2358static int tb_switch_add_dma_port(struct tb_switch *sw)
2359{
2360 u32 status;
2361 int ret;
2362
2363 switch (sw->generation) {
2364 case 2:
2365
2366 if (tb_route(sw))
2367 return 0;
2368
2369 fallthrough;
2370 case 3:
2371 case 4:
2372 ret = tb_switch_set_uuid(sw);
2373 if (ret)
2374 return ret;
2375 break;
2376
2377 default:
2378
2379
2380
2381
2382 if (!sw->safe_mode)
2383 return 0;
2384 break;
2385 }
2386
2387 if (sw->no_nvm_upgrade)
2388 return 0;
2389
2390 if (tb_switch_is_usb4(sw)) {
2391 ret = usb4_switch_nvm_authenticate_status(sw, &status);
2392 if (ret)
2393 return ret;
2394
2395 if (status) {
2396 tb_sw_info(sw, "switch flash authentication failed\n");
2397 nvm_set_auth_status(sw, status);
2398 }
2399
2400 return 0;
2401 }
2402
2403
2404 if (!tb_route(sw) && !tb_switch_is_icm(sw))
2405 return 0;
2406
2407 sw->dma_port = dma_port_alloc(sw);
2408 if (!sw->dma_port)
2409 return 0;
2410
2411
2412
2413
2414
2415
2416
2417 nvm_get_auth_status(sw, &status);
2418 if (status) {
2419 if (!tb_route(sw))
2420 nvm_authenticate_complete_dma_port(sw);
2421 return 0;
2422 }
2423
2424
2425
2426
2427
2428
2429 ret = dma_port_flash_update_auth_status(sw->dma_port, &status);
2430 if (ret <= 0)
2431 return ret;
2432
2433
2434 if (!tb_route(sw))
2435 nvm_authenticate_complete_dma_port(sw);
2436
2437 if (status) {
2438 tb_sw_info(sw, "switch flash authentication failed\n");
2439 nvm_set_auth_status(sw, status);
2440 }
2441
2442 tb_sw_info(sw, "power cycling the switch now\n");
2443 dma_port_power_cycle(sw->dma_port);
2444
2445
2446
2447
2448
2449 return -ESHUTDOWN;
2450}
2451
2452static void tb_switch_default_link_ports(struct tb_switch *sw)
2453{
2454 int i;
2455
2456 for (i = 1; i <= sw->config.max_port_number; i++) {
2457 struct tb_port *port = &sw->ports[i];
2458 struct tb_port *subordinate;
2459
2460 if (!tb_port_is_null(port))
2461 continue;
2462
2463
2464 if (i == sw->config.max_port_number ||
2465 !tb_port_is_null(&sw->ports[i + 1]))
2466 continue;
2467
2468
2469 subordinate = &sw->ports[i + 1];
2470 if (!port->dual_link_port && !subordinate->dual_link_port) {
2471 port->link_nr = 0;
2472 port->dual_link_port = subordinate;
2473 subordinate->link_nr = 1;
2474 subordinate->dual_link_port = port;
2475
2476 tb_sw_dbg(sw, "linked ports %d <-> %d\n",
2477 port->port, subordinate->port);
2478 }
2479 }
2480}
2481
2482static bool tb_switch_lane_bonding_possible(struct tb_switch *sw)
2483{
2484 const struct tb_port *up = tb_upstream_port(sw);
2485
2486 if (!up->dual_link_port || !up->dual_link_port->remote)
2487 return false;
2488
2489 if (tb_switch_is_usb4(sw))
2490 return usb4_switch_lane_bonding_possible(sw);
2491 return tb_lc_lane_bonding_possible(sw);
2492}
2493
2494static int tb_switch_update_link_attributes(struct tb_switch *sw)
2495{
2496 struct tb_port *up;
2497 bool change = false;
2498 int ret;
2499
2500 if (!tb_route(sw) || tb_switch_is_icm(sw))
2501 return 0;
2502
2503 up = tb_upstream_port(sw);
2504
2505 ret = tb_port_get_link_speed(up);
2506 if (ret < 0)
2507 return ret;
2508 if (sw->link_speed != ret)
2509 change = true;
2510 sw->link_speed = ret;
2511
2512 ret = tb_port_get_link_width(up);
2513 if (ret < 0)
2514 return ret;
2515 if (sw->link_width != ret)
2516 change = true;
2517 sw->link_width = ret;
2518
2519
2520 if (device_is_registered(&sw->dev) && change)
2521 kobject_uevent(&sw->dev.kobj, KOBJ_CHANGE);
2522
2523 return 0;
2524}
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534int tb_switch_lane_bonding_enable(struct tb_switch *sw)
2535{
2536 struct tb_switch *parent = tb_to_switch(sw->dev.parent);
2537 struct tb_port *up, *down;
2538 u64 route = tb_route(sw);
2539 int ret;
2540
2541 if (!route)
2542 return 0;
2543
2544 if (!tb_switch_lane_bonding_possible(sw))
2545 return 0;
2546
2547 up = tb_upstream_port(sw);
2548 down = tb_port_at(route, parent);
2549
2550 if (!tb_port_is_width_supported(up, 2) ||
2551 !tb_port_is_width_supported(down, 2))
2552 return 0;
2553
2554 ret = tb_port_lane_bonding_enable(up);
2555 if (ret) {
2556 tb_port_warn(up, "failed to enable lane bonding\n");
2557 return ret;
2558 }
2559
2560 ret = tb_port_lane_bonding_enable(down);
2561 if (ret) {
2562 tb_port_warn(down, "failed to enable lane bonding\n");
2563 tb_port_lane_bonding_disable(up);
2564 return ret;
2565 }
2566
2567 ret = tb_port_wait_for_link_width(down, 2, 100);
2568 if (ret) {
2569 tb_port_warn(down, "timeout enabling lane bonding\n");
2570 return ret;
2571 }
2572
2573 tb_port_update_credits(down);
2574 tb_port_update_credits(up);
2575 tb_switch_update_link_attributes(sw);
2576
2577 tb_sw_dbg(sw, "lane bonding enabled\n");
2578 return ret;
2579}
2580
2581
2582
2583
2584
2585
2586
2587
2588void tb_switch_lane_bonding_disable(struct tb_switch *sw)
2589{
2590 struct tb_switch *parent = tb_to_switch(sw->dev.parent);
2591 struct tb_port *up, *down;
2592
2593 if (!tb_route(sw))
2594 return;
2595
2596 up = tb_upstream_port(sw);
2597 if (!up->bonded)
2598 return;
2599
2600 down = tb_port_at(tb_route(sw), parent);
2601
2602 tb_port_lane_bonding_disable(up);
2603 tb_port_lane_bonding_disable(down);
2604
2605
2606
2607
2608
2609 if (tb_port_wait_for_link_width(down, 1, 100) == -ETIMEDOUT)
2610 tb_sw_warn(sw, "timeout disabling lane bonding\n");
2611
2612 tb_port_update_credits(down);
2613 tb_port_update_credits(up);
2614 tb_switch_update_link_attributes(sw);
2615
2616 tb_sw_dbg(sw, "lane bonding disabled\n");
2617}
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631int tb_switch_configure_link(struct tb_switch *sw)
2632{
2633 struct tb_port *up, *down;
2634 int ret;
2635
2636 if (!tb_route(sw) || tb_switch_is_icm(sw))
2637 return 0;
2638
2639 up = tb_upstream_port(sw);
2640 if (tb_switch_is_usb4(up->sw))
2641 ret = usb4_port_configure(up);
2642 else
2643 ret = tb_lc_configure_port(up);
2644 if (ret)
2645 return ret;
2646
2647 down = up->remote;
2648 if (tb_switch_is_usb4(down->sw))
2649 return usb4_port_configure(down);
2650 return tb_lc_configure_port(down);
2651}
2652
2653
2654
2655
2656
2657
2658
2659
2660void tb_switch_unconfigure_link(struct tb_switch *sw)
2661{
2662 struct tb_port *up, *down;
2663
2664 if (sw->is_unplugged)
2665 return;
2666 if (!tb_route(sw) || tb_switch_is_icm(sw))
2667 return;
2668
2669 up = tb_upstream_port(sw);
2670 if (tb_switch_is_usb4(up->sw))
2671 usb4_port_unconfigure(up);
2672 else
2673 tb_lc_unconfigure_port(up);
2674
2675 down = up->remote;
2676 if (tb_switch_is_usb4(down->sw))
2677 usb4_port_unconfigure(down);
2678 else
2679 tb_lc_unconfigure_port(down);
2680}
2681
2682static void tb_switch_credits_init(struct tb_switch *sw)
2683{
2684 if (tb_switch_is_icm(sw))
2685 return;
2686 if (!tb_switch_is_usb4(sw))
2687 return;
2688 if (usb4_switch_credits_init(sw))
2689 tb_sw_info(sw, "failed to determine preferred buffer allocation, using defaults\n");
2690}
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704int tb_switch_add(struct tb_switch *sw)
2705{
2706 int i, ret;
2707
2708
2709
2710
2711
2712
2713
2714
2715 ret = tb_switch_add_dma_port(sw);
2716 if (ret) {
2717 dev_err(&sw->dev, "failed to add DMA port\n");
2718 return ret;
2719 }
2720
2721 if (!sw->safe_mode) {
2722 tb_switch_credits_init(sw);
2723
2724
2725 ret = tb_drom_read(sw);
2726 if (ret) {
2727 dev_err(&sw->dev, "reading DROM failed\n");
2728 return ret;
2729 }
2730 tb_sw_dbg(sw, "uid: %#llx\n", sw->uid);
2731
2732 tb_check_quirks(sw);
2733
2734 ret = tb_switch_set_uuid(sw);
2735 if (ret) {
2736 dev_err(&sw->dev, "failed to set UUID\n");
2737 return ret;
2738 }
2739
2740 for (i = 0; i <= sw->config.max_port_number; i++) {
2741 if (sw->ports[i].disabled) {
2742 tb_port_dbg(&sw->ports[i], "disabled by eeprom\n");
2743 continue;
2744 }
2745 ret = tb_init_port(&sw->ports[i]);
2746 if (ret) {
2747 dev_err(&sw->dev, "failed to initialize port %d\n", i);
2748 return ret;
2749 }
2750 }
2751
2752 tb_switch_default_link_ports(sw);
2753
2754 ret = tb_switch_update_link_attributes(sw);
2755 if (ret)
2756 return ret;
2757
2758 ret = tb_switch_tmu_init(sw);
2759 if (ret)
2760 return ret;
2761 }
2762
2763 ret = device_add(&sw->dev);
2764 if (ret) {
2765 dev_err(&sw->dev, "failed to add device: %d\n", ret);
2766 return ret;
2767 }
2768
2769 if (tb_route(sw)) {
2770 dev_info(&sw->dev, "new device found, vendor=%#x device=%#x\n",
2771 sw->vendor, sw->device);
2772 if (sw->vendor_name && sw->device_name)
2773 dev_info(&sw->dev, "%s %s\n", sw->vendor_name,
2774 sw->device_name);
2775 }
2776
2777 ret = usb4_switch_add_ports(sw);
2778 if (ret) {
2779 dev_err(&sw->dev, "failed to add USB4 ports\n");
2780 goto err_del;
2781 }
2782
2783 ret = tb_switch_nvm_add(sw);
2784 if (ret) {
2785 dev_err(&sw->dev, "failed to add NVM devices\n");
2786 goto err_ports;
2787 }
2788
2789
2790
2791
2792
2793
2794 device_init_wakeup(&sw->dev, true);
2795
2796 pm_runtime_set_active(&sw->dev);
2797 if (sw->rpm) {
2798 pm_runtime_set_autosuspend_delay(&sw->dev, TB_AUTOSUSPEND_DELAY);
2799 pm_runtime_use_autosuspend(&sw->dev);
2800 pm_runtime_mark_last_busy(&sw->dev);
2801 pm_runtime_enable(&sw->dev);
2802 pm_request_autosuspend(&sw->dev);
2803 }
2804
2805 tb_switch_debugfs_init(sw);
2806 return 0;
2807
2808err_ports:
2809 usb4_switch_remove_ports(sw);
2810err_del:
2811 device_del(&sw->dev);
2812
2813 return ret;
2814}
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824void tb_switch_remove(struct tb_switch *sw)
2825{
2826 struct tb_port *port;
2827
2828 tb_switch_debugfs_remove(sw);
2829
2830 if (sw->rpm) {
2831 pm_runtime_get_sync(&sw->dev);
2832 pm_runtime_disable(&sw->dev);
2833 }
2834
2835
2836 tb_switch_for_each_port(sw, port) {
2837 if (tb_port_has_remote(port)) {
2838 tb_switch_remove(port->remote->sw);
2839 port->remote = NULL;
2840 } else if (port->xdomain) {
2841 tb_xdomain_remove(port->xdomain);
2842 port->xdomain = NULL;
2843 }
2844
2845
2846 tb_retimer_remove_all(port);
2847 }
2848
2849 if (!sw->is_unplugged)
2850 tb_plug_events_active(sw, false);
2851
2852 tb_switch_nvm_remove(sw);
2853 usb4_switch_remove_ports(sw);
2854
2855 if (tb_route(sw))
2856 dev_info(&sw->dev, "device disconnected\n");
2857 device_unregister(&sw->dev);
2858}
2859
2860
2861
2862
2863
2864void tb_sw_set_unplugged(struct tb_switch *sw)
2865{
2866 struct tb_port *port;
2867
2868 if (sw == sw->tb->root_switch) {
2869 tb_sw_WARN(sw, "cannot unplug root switch\n");
2870 return;
2871 }
2872 if (sw->is_unplugged) {
2873 tb_sw_WARN(sw, "is_unplugged already set\n");
2874 return;
2875 }
2876 sw->is_unplugged = true;
2877 tb_switch_for_each_port(sw, port) {
2878 if (tb_port_has_remote(port))
2879 tb_sw_set_unplugged(port->remote->sw);
2880 else if (port->xdomain)
2881 port->xdomain->is_unplugged = true;
2882 }
2883}
2884
2885static int tb_switch_set_wake(struct tb_switch *sw, unsigned int flags)
2886{
2887 if (flags)
2888 tb_sw_dbg(sw, "enabling wakeup: %#x\n", flags);
2889 else
2890 tb_sw_dbg(sw, "disabling wakeup\n");
2891
2892 if (tb_switch_is_usb4(sw))
2893 return usb4_switch_set_wake(sw, flags);
2894 return tb_lc_set_wake(sw, flags);
2895}
2896
2897int tb_switch_resume(struct tb_switch *sw)
2898{
2899 struct tb_port *port;
2900 int err;
2901
2902 tb_sw_dbg(sw, "resuming switch\n");
2903
2904
2905
2906
2907
2908 if (tb_route(sw)) {
2909 u64 uid;
2910
2911
2912
2913
2914
2915
2916 err = tb_cfg_get_upstream_port(sw->tb->ctl, tb_route(sw));
2917 if (err < 0) {
2918 tb_sw_info(sw, "switch not present anymore\n");
2919 return err;
2920 }
2921
2922 if (tb_switch_is_usb4(sw))
2923 err = usb4_switch_read_uid(sw, &uid);
2924 else
2925 err = tb_drom_read_uid_only(sw, &uid);
2926 if (err) {
2927 tb_sw_warn(sw, "uid read failed\n");
2928 return err;
2929 }
2930 if (sw->uid != uid) {
2931 tb_sw_info(sw,
2932 "changed while suspended (uid %#llx -> %#llx)\n",
2933 sw->uid, uid);
2934 return -ENODEV;
2935 }
2936 }
2937
2938 err = tb_switch_configure(sw);
2939 if (err)
2940 return err;
2941
2942
2943 tb_switch_set_wake(sw, 0);
2944
2945 err = tb_switch_tmu_init(sw);
2946 if (err)
2947 return err;
2948
2949
2950 tb_switch_for_each_port(sw, port) {
2951 if (!tb_port_is_null(port))
2952 continue;
2953
2954 if (!tb_port_resume(port))
2955 continue;
2956
2957 if (tb_wait_for_port(port, true) <= 0) {
2958 tb_port_warn(port,
2959 "lost during suspend, disconnecting\n");
2960 if (tb_port_has_remote(port))
2961 tb_sw_set_unplugged(port->remote->sw);
2962 else if (port->xdomain)
2963 port->xdomain->is_unplugged = true;
2964 } else {
2965
2966
2967
2968
2969 if (tb_port_unlock(port))
2970 tb_port_warn(port, "failed to unlock port\n");
2971 if (port->remote && tb_switch_resume(port->remote->sw)) {
2972 tb_port_warn(port,
2973 "lost during suspend, disconnecting\n");
2974 tb_sw_set_unplugged(port->remote->sw);
2975 }
2976 }
2977 }
2978 return 0;
2979}
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991void tb_switch_suspend(struct tb_switch *sw, bool runtime)
2992{
2993 unsigned int flags = 0;
2994 struct tb_port *port;
2995 int err;
2996
2997 tb_sw_dbg(sw, "suspending switch\n");
2998
2999 err = tb_plug_events_active(sw, false);
3000 if (err)
3001 return;
3002
3003 tb_switch_for_each_port(sw, port) {
3004 if (tb_port_has_remote(port))
3005 tb_switch_suspend(port->remote->sw, runtime);
3006 }
3007
3008 if (runtime) {
3009
3010 flags |= TB_WAKE_ON_CONNECT | TB_WAKE_ON_DISCONNECT;
3011 flags |= TB_WAKE_ON_USB4;
3012 flags |= TB_WAKE_ON_USB3 | TB_WAKE_ON_PCIE | TB_WAKE_ON_DP;
3013 } else if (device_may_wakeup(&sw->dev)) {
3014 flags |= TB_WAKE_ON_USB4 | TB_WAKE_ON_USB3 | TB_WAKE_ON_PCIE;
3015 }
3016
3017 tb_switch_set_wake(sw, flags);
3018
3019 if (tb_switch_is_usb4(sw))
3020 usb4_switch_set_sleep(sw);
3021 else
3022 tb_lc_set_sleep(sw);
3023}
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033bool tb_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in)
3034{
3035 if (tb_switch_is_usb4(sw))
3036 return usb4_switch_query_dp_resource(sw, in);
3037 return tb_lc_dp_sink_query(sw, in);
3038}
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049int tb_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
3050{
3051 if (tb_switch_is_usb4(sw))
3052 return usb4_switch_alloc_dp_resource(sw, in);
3053 return tb_lc_dp_sink_alloc(sw, in);
3054}
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064void tb_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
3065{
3066 int ret;
3067
3068 if (tb_switch_is_usb4(sw))
3069 ret = usb4_switch_dealloc_dp_resource(sw, in);
3070 else
3071 ret = tb_lc_dp_sink_dealloc(sw, in);
3072
3073 if (ret)
3074 tb_sw_warn(sw, "failed to de-allocate DP resource for port %d\n",
3075 in->port);
3076}
3077
3078struct tb_sw_lookup {
3079 struct tb *tb;
3080 u8 link;
3081 u8 depth;
3082 const uuid_t *uuid;
3083 u64 route;
3084};
3085
3086static int tb_switch_match(struct device *dev, const void *data)
3087{
3088 struct tb_switch *sw = tb_to_switch(dev);
3089 const struct tb_sw_lookup *lookup = data;
3090
3091 if (!sw)
3092 return 0;
3093 if (sw->tb != lookup->tb)
3094 return 0;
3095
3096 if (lookup->uuid)
3097 return !memcmp(sw->uuid, lookup->uuid, sizeof(*lookup->uuid));
3098
3099 if (lookup->route) {
3100 return sw->config.route_lo == lower_32_bits(lookup->route) &&
3101 sw->config.route_hi == upper_32_bits(lookup->route);
3102 }
3103
3104
3105 if (!lookup->depth)
3106 return !sw->depth;
3107
3108 return sw->link == lookup->link && sw->depth == lookup->depth;
3109}
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link, u8 depth)
3121{
3122 struct tb_sw_lookup lookup;
3123 struct device *dev;
3124
3125 memset(&lookup, 0, sizeof(lookup));
3126 lookup.tb = tb;
3127 lookup.link = link;
3128 lookup.depth = depth;
3129
3130 dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match);
3131 if (dev)
3132 return tb_to_switch(dev);
3133
3134 return NULL;
3135}
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid)
3146{
3147 struct tb_sw_lookup lookup;
3148 struct device *dev;
3149
3150 memset(&lookup, 0, sizeof(lookup));
3151 lookup.tb = tb;
3152 lookup.uuid = uuid;
3153
3154 dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match);
3155 if (dev)
3156 return tb_to_switch(dev);
3157
3158 return NULL;
3159}
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route)
3170{
3171 struct tb_sw_lookup lookup;
3172 struct device *dev;
3173
3174 if (!route)
3175 return tb_switch_get(tb->root_switch);
3176
3177 memset(&lookup, 0, sizeof(lookup));
3178 lookup.tb = tb;
3179 lookup.route = route;
3180
3181 dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match);
3182 if (dev)
3183 return tb_to_switch(dev);
3184
3185 return NULL;
3186}
3187
3188
3189
3190
3191
3192
3193struct tb_port *tb_switch_find_port(struct tb_switch *sw,
3194 enum tb_port_type type)
3195{
3196 struct tb_port *port;
3197
3198 tb_switch_for_each_port(sw, port) {
3199 if (port->config.type == type)
3200 return port;
3201 }
3202
3203 return NULL;
3204}
3205