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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 res = tb_port_read(port, &port->config, TB_CFG_PORT, 0, 8);
728 if (res) {
729 if (res == -ENODEV) {
730 tb_dbg(port->sw->tb, " Port %d: not implemented\n",
731 port->port);
732 port->disabled = true;
733 return 0;
734 }
735 return res;
736 }
737
738
739 if (port->config.type == TB_TYPE_PORT && port->port != 0) {
740 cap = tb_port_find_cap(port, TB_PORT_CAP_PHY);
741
742 if (cap > 0)
743 port->cap_phy = cap;
744 else
745 tb_port_WARN(port, "non switch port without a PHY\n");
746
747 cap = tb_port_find_cap(port, TB_PORT_CAP_USB4);
748 if (cap > 0)
749 port->cap_usb4 = cap;
750
751
752
753
754
755
756 if (tb_switch_is_usb4(port->sw)) {
757 struct tb_regs_hop hop;
758
759 if (!tb_port_read(port, &hop, TB_CFG_HOPS, 0, 2))
760 port->ctl_credits = hop.initial_credits;
761 }
762 if (!port->ctl_credits)
763 port->ctl_credits = 2;
764
765 } else if (port->port != 0) {
766 cap = tb_port_find_cap(port, TB_PORT_CAP_ADAP);
767 if (cap > 0)
768 port->cap_adap = cap;
769 }
770
771 port->total_credits =
772 (port->config.nfc_credits & ADP_CS_4_TOTAL_BUFFERS_MASK) >>
773 ADP_CS_4_TOTAL_BUFFERS_SHIFT;
774
775 tb_dump_port(port->sw->tb, port);
776
777 INIT_LIST_HEAD(&port->list);
778 return 0;
779
780}
781
782static int tb_port_alloc_hopid(struct tb_port *port, bool in, int min_hopid,
783 int max_hopid)
784{
785 int port_max_hopid;
786 struct ida *ida;
787
788 if (in) {
789 port_max_hopid = port->config.max_in_hop_id;
790 ida = &port->in_hopids;
791 } else {
792 port_max_hopid = port->config.max_out_hop_id;
793 ida = &port->out_hopids;
794 }
795
796
797
798
799
800 if (!tb_port_is_nhi(port) && min_hopid < TB_PATH_MIN_HOPID)
801 min_hopid = TB_PATH_MIN_HOPID;
802
803 if (max_hopid < 0 || max_hopid > port_max_hopid)
804 max_hopid = port_max_hopid;
805
806 return ida_simple_get(ida, min_hopid, max_hopid + 1, GFP_KERNEL);
807}
808
809
810
811
812
813
814
815
816
817
818int tb_port_alloc_in_hopid(struct tb_port *port, int min_hopid, int max_hopid)
819{
820 return tb_port_alloc_hopid(port, true, min_hopid, max_hopid);
821}
822
823
824
825
826
827
828
829
830
831
832int tb_port_alloc_out_hopid(struct tb_port *port, int min_hopid, int max_hopid)
833{
834 return tb_port_alloc_hopid(port, false, min_hopid, max_hopid);
835}
836
837
838
839
840
841
842void tb_port_release_in_hopid(struct tb_port *port, int hopid)
843{
844 ida_simple_remove(&port->in_hopids, hopid);
845}
846
847
848
849
850
851
852void tb_port_release_out_hopid(struct tb_port *port, int hopid)
853{
854 ida_simple_remove(&port->out_hopids, hopid);
855}
856
857static inline bool tb_switch_is_reachable(const struct tb_switch *parent,
858 const struct tb_switch *sw)
859{
860 u64 mask = (1ULL << parent->config.depth * 8) - 1;
861 return (tb_route(parent) & mask) == (tb_route(sw) & mask);
862}
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
880 struct tb_port *prev)
881{
882 struct tb_port *next;
883
884 if (!prev)
885 return start;
886
887 if (prev->sw == end->sw) {
888 if (prev == end)
889 return NULL;
890 return end;
891 }
892
893 if (tb_switch_is_reachable(prev->sw, end->sw)) {
894 next = tb_port_at(tb_route(end->sw), prev->sw);
895
896 if (prev->remote &&
897 (next == prev || next->dual_link_port == prev))
898 next = prev->remote;
899 } else {
900 if (tb_is_upstream_port(prev)) {
901 next = prev->remote;
902 } else {
903 next = tb_upstream_port(prev->sw);
904
905
906
907
908 if (next->dual_link_port &&
909 next->link_nr != prev->link_nr) {
910 next = next->dual_link_port;
911 }
912 }
913 }
914
915 return next != prev ? next : NULL;
916}
917
918
919
920
921
922
923
924int tb_port_get_link_speed(struct tb_port *port)
925{
926 u32 val, speed;
927 int ret;
928
929 if (!port->cap_phy)
930 return -EINVAL;
931
932 ret = tb_port_read(port, &val, TB_CFG_PORT,
933 port->cap_phy + LANE_ADP_CS_1, 1);
934 if (ret)
935 return ret;
936
937 speed = (val & LANE_ADP_CS_1_CURRENT_SPEED_MASK) >>
938 LANE_ADP_CS_1_CURRENT_SPEED_SHIFT;
939 return speed == LANE_ADP_CS_1_CURRENT_SPEED_GEN3 ? 20 : 10;
940}
941
942
943
944
945
946
947
948
949int tb_port_get_link_width(struct tb_port *port)
950{
951 u32 val;
952 int ret;
953
954 if (!port->cap_phy)
955 return -EINVAL;
956
957 ret = tb_port_read(port, &val, TB_CFG_PORT,
958 port->cap_phy + LANE_ADP_CS_1, 1);
959 if (ret)
960 return ret;
961
962 return (val & LANE_ADP_CS_1_CURRENT_WIDTH_MASK) >>
963 LANE_ADP_CS_1_CURRENT_WIDTH_SHIFT;
964}
965
966static bool tb_port_is_width_supported(struct tb_port *port, int width)
967{
968 u32 phy, widths;
969 int ret;
970
971 if (!port->cap_phy)
972 return false;
973
974 ret = tb_port_read(port, &phy, TB_CFG_PORT,
975 port->cap_phy + LANE_ADP_CS_0, 1);
976 if (ret)
977 return false;
978
979 widths = (phy & LANE_ADP_CS_0_SUPPORTED_WIDTH_MASK) >>
980 LANE_ADP_CS_0_SUPPORTED_WIDTH_SHIFT;
981
982 return !!(widths & width);
983}
984
985static int tb_port_set_link_width(struct tb_port *port, unsigned int width)
986{
987 u32 val;
988 int ret;
989
990 if (!port->cap_phy)
991 return -EINVAL;
992
993 ret = tb_port_read(port, &val, TB_CFG_PORT,
994 port->cap_phy + LANE_ADP_CS_1, 1);
995 if (ret)
996 return ret;
997
998 val &= ~LANE_ADP_CS_1_TARGET_WIDTH_MASK;
999 switch (width) {
1000 case 1:
1001 val |= LANE_ADP_CS_1_TARGET_WIDTH_SINGLE <<
1002 LANE_ADP_CS_1_TARGET_WIDTH_SHIFT;
1003 break;
1004 case 2:
1005 val |= LANE_ADP_CS_1_TARGET_WIDTH_DUAL <<
1006 LANE_ADP_CS_1_TARGET_WIDTH_SHIFT;
1007 break;
1008 default:
1009 return -EINVAL;
1010 }
1011
1012 val |= LANE_ADP_CS_1_LB;
1013
1014 return tb_port_write(port, &val, TB_CFG_PORT,
1015 port->cap_phy + LANE_ADP_CS_1, 1);
1016}
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030int tb_port_lane_bonding_enable(struct tb_port *port)
1031{
1032 int ret;
1033
1034
1035
1036
1037
1038 ret = tb_port_get_link_width(port);
1039 if (ret == 1) {
1040 ret = tb_port_set_link_width(port, 2);
1041 if (ret)
1042 return ret;
1043 }
1044
1045 ret = tb_port_get_link_width(port->dual_link_port);
1046 if (ret == 1) {
1047 ret = tb_port_set_link_width(port->dual_link_port, 2);
1048 if (ret) {
1049 tb_port_set_link_width(port, 1);
1050 return ret;
1051 }
1052 }
1053
1054 port->bonded = true;
1055 port->dual_link_port->bonded = true;
1056
1057 return 0;
1058}
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068void tb_port_lane_bonding_disable(struct tb_port *port)
1069{
1070 port->dual_link_port->bonded = false;
1071 port->bonded = false;
1072
1073 tb_port_set_link_width(port->dual_link_port, 1);
1074 tb_port_set_link_width(port, 1);
1075}
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088int tb_port_wait_for_link_width(struct tb_port *port, int width,
1089 int timeout_msec)
1090{
1091 ktime_t timeout = ktime_add_ms(ktime_get(), timeout_msec);
1092 int ret;
1093
1094 do {
1095 ret = tb_port_get_link_width(port);
1096 if (ret < 0)
1097 return ret;
1098 else if (ret == width)
1099 return 0;
1100
1101 usleep_range(1000, 2000);
1102 } while (ktime_before(ktime_get(), timeout));
1103
1104 return -ETIMEDOUT;
1105}
1106
1107static int tb_port_do_update_credits(struct tb_port *port)
1108{
1109 u32 nfc_credits;
1110 int ret;
1111
1112 ret = tb_port_read(port, &nfc_credits, TB_CFG_PORT, ADP_CS_4, 1);
1113 if (ret)
1114 return ret;
1115
1116 if (nfc_credits != port->config.nfc_credits) {
1117 u32 total;
1118
1119 total = (nfc_credits & ADP_CS_4_TOTAL_BUFFERS_MASK) >>
1120 ADP_CS_4_TOTAL_BUFFERS_SHIFT;
1121
1122 tb_port_dbg(port, "total credits changed %u -> %u\n",
1123 port->total_credits, total);
1124
1125 port->config.nfc_credits = nfc_credits;
1126 port->total_credits = total;
1127 }
1128
1129 return 0;
1130}
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140int tb_port_update_credits(struct tb_port *port)
1141{
1142 int ret;
1143
1144 ret = tb_port_do_update_credits(port);
1145 if (ret)
1146 return ret;
1147 return tb_port_do_update_credits(port->dual_link_port);
1148}
1149
1150static int tb_port_start_lane_initialization(struct tb_port *port)
1151{
1152 int ret;
1153
1154 if (tb_switch_is_usb4(port->sw))
1155 return 0;
1156
1157 ret = tb_lc_start_lane_initialization(port);
1158 return ret == -EINVAL ? 0 : ret;
1159}
1160
1161
1162
1163
1164
1165static bool tb_port_resume(struct tb_port *port)
1166{
1167 bool has_remote = tb_port_has_remote(port);
1168
1169 if (port->usb4) {
1170 usb4_port_device_resume(port->usb4);
1171 } else if (!has_remote) {
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181 if (!tb_is_upstream_port(port) || port->xdomain)
1182 tb_port_start_lane_initialization(port);
1183 }
1184
1185 return has_remote || port->xdomain;
1186}
1187
1188
1189
1190
1191
1192bool tb_port_is_enabled(struct tb_port *port)
1193{
1194 switch (port->config.type) {
1195 case TB_TYPE_PCIE_UP:
1196 case TB_TYPE_PCIE_DOWN:
1197 return tb_pci_port_is_enabled(port);
1198
1199 case TB_TYPE_DP_HDMI_IN:
1200 case TB_TYPE_DP_HDMI_OUT:
1201 return tb_dp_port_is_enabled(port);
1202
1203 case TB_TYPE_USB3_UP:
1204 case TB_TYPE_USB3_DOWN:
1205 return tb_usb3_port_is_enabled(port);
1206
1207 default:
1208 return false;
1209 }
1210}
1211
1212
1213
1214
1215
1216bool tb_usb3_port_is_enabled(struct tb_port *port)
1217{
1218 u32 data;
1219
1220 if (tb_port_read(port, &data, TB_CFG_PORT,
1221 port->cap_adap + ADP_USB3_CS_0, 1))
1222 return false;
1223
1224 return !!(data & ADP_USB3_CS_0_PE);
1225}
1226
1227
1228
1229
1230
1231
1232int tb_usb3_port_enable(struct tb_port *port, bool enable)
1233{
1234 u32 word = enable ? (ADP_USB3_CS_0_PE | ADP_USB3_CS_0_V)
1235 : ADP_USB3_CS_0_V;
1236
1237 if (!port->cap_adap)
1238 return -ENXIO;
1239 return tb_port_write(port, &word, TB_CFG_PORT,
1240 port->cap_adap + ADP_USB3_CS_0, 1);
1241}
1242
1243
1244
1245
1246
1247bool tb_pci_port_is_enabled(struct tb_port *port)
1248{
1249 u32 data;
1250
1251 if (tb_port_read(port, &data, TB_CFG_PORT,
1252 port->cap_adap + ADP_PCIE_CS_0, 1))
1253 return false;
1254
1255 return !!(data & ADP_PCIE_CS_0_PE);
1256}
1257
1258
1259
1260
1261
1262
1263int tb_pci_port_enable(struct tb_port *port, bool enable)
1264{
1265 u32 word = enable ? ADP_PCIE_CS_0_PE : 0x0;
1266 if (!port->cap_adap)
1267 return -ENXIO;
1268 return tb_port_write(port, &word, TB_CFG_PORT,
1269 port->cap_adap + ADP_PCIE_CS_0, 1);
1270}
1271
1272
1273
1274
1275
1276
1277
1278int tb_dp_port_hpd_is_active(struct tb_port *port)
1279{
1280 u32 data;
1281 int ret;
1282
1283 ret = tb_port_read(port, &data, TB_CFG_PORT,
1284 port->cap_adap + ADP_DP_CS_2, 1);
1285 if (ret)
1286 return ret;
1287
1288 return !!(data & ADP_DP_CS_2_HDP);
1289}
1290
1291
1292
1293
1294
1295
1296
1297int tb_dp_port_hpd_clear(struct tb_port *port)
1298{
1299 u32 data;
1300 int ret;
1301
1302 ret = tb_port_read(port, &data, TB_CFG_PORT,
1303 port->cap_adap + ADP_DP_CS_3, 1);
1304 if (ret)
1305 return ret;
1306
1307 data |= ADP_DP_CS_3_HDPC;
1308 return tb_port_write(port, &data, TB_CFG_PORT,
1309 port->cap_adap + ADP_DP_CS_3, 1);
1310}
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321int tb_dp_port_set_hops(struct tb_port *port, unsigned int video,
1322 unsigned int aux_tx, unsigned int aux_rx)
1323{
1324 u32 data[2];
1325 int ret;
1326
1327 ret = tb_port_read(port, data, TB_CFG_PORT,
1328 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1329 if (ret)
1330 return ret;
1331
1332 data[0] &= ~ADP_DP_CS_0_VIDEO_HOPID_MASK;
1333 data[1] &= ~ADP_DP_CS_1_AUX_RX_HOPID_MASK;
1334 data[1] &= ~ADP_DP_CS_1_AUX_RX_HOPID_MASK;
1335
1336 data[0] |= (video << ADP_DP_CS_0_VIDEO_HOPID_SHIFT) &
1337 ADP_DP_CS_0_VIDEO_HOPID_MASK;
1338 data[1] |= aux_tx & ADP_DP_CS_1_AUX_TX_HOPID_MASK;
1339 data[1] |= (aux_rx << ADP_DP_CS_1_AUX_RX_HOPID_SHIFT) &
1340 ADP_DP_CS_1_AUX_RX_HOPID_MASK;
1341
1342 return tb_port_write(port, data, TB_CFG_PORT,
1343 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1344}
1345
1346
1347
1348
1349
1350bool tb_dp_port_is_enabled(struct tb_port *port)
1351{
1352 u32 data[2];
1353
1354 if (tb_port_read(port, data, TB_CFG_PORT, port->cap_adap + ADP_DP_CS_0,
1355 ARRAY_SIZE(data)))
1356 return false;
1357
1358 return !!(data[0] & (ADP_DP_CS_0_VE | ADP_DP_CS_0_AE));
1359}
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369int tb_dp_port_enable(struct tb_port *port, bool enable)
1370{
1371 u32 data[2];
1372 int ret;
1373
1374 ret = tb_port_read(port, data, TB_CFG_PORT,
1375 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1376 if (ret)
1377 return ret;
1378
1379 if (enable)
1380 data[0] |= ADP_DP_CS_0_VE | ADP_DP_CS_0_AE;
1381 else
1382 data[0] &= ~(ADP_DP_CS_0_VE | ADP_DP_CS_0_AE);
1383
1384 return tb_port_write(port, data, TB_CFG_PORT,
1385 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1386}
1387
1388
1389
1390static const char *tb_switch_generation_name(const struct tb_switch *sw)
1391{
1392 switch (sw->generation) {
1393 case 1:
1394 return "Thunderbolt 1";
1395 case 2:
1396 return "Thunderbolt 2";
1397 case 3:
1398 return "Thunderbolt 3";
1399 case 4:
1400 return "USB4";
1401 default:
1402 return "Unknown";
1403 }
1404}
1405
1406static void tb_dump_switch(const struct tb *tb, const struct tb_switch *sw)
1407{
1408 const struct tb_regs_switch_header *regs = &sw->config;
1409
1410 tb_dbg(tb, " %s Switch: %x:%x (Revision: %d, TB Version: %d)\n",
1411 tb_switch_generation_name(sw), regs->vendor_id, regs->device_id,
1412 regs->revision, regs->thunderbolt_version);
1413 tb_dbg(tb, " Max Port Number: %d\n", regs->max_port_number);
1414 tb_dbg(tb, " Config:\n");
1415 tb_dbg(tb,
1416 " Upstream Port Number: %d Depth: %d Route String: %#llx Enabled: %d, PlugEventsDelay: %dms\n",
1417 regs->upstream_port_number, regs->depth,
1418 (((u64) regs->route_hi) << 32) | regs->route_lo,
1419 regs->enabled, regs->plug_events_delay);
1420 tb_dbg(tb, " unknown1: %#x unknown4: %#x\n",
1421 regs->__unknown1, regs->__unknown4);
1422}
1423
1424
1425
1426
1427
1428
1429
1430int tb_switch_reset(struct tb_switch *sw)
1431{
1432 struct tb_cfg_result res;
1433
1434 if (sw->generation > 1)
1435 return 0;
1436
1437 tb_sw_dbg(sw, "resetting switch\n");
1438
1439 res.err = tb_sw_write(sw, ((u32 *) &sw->config) + 2,
1440 TB_CFG_SWITCH, 2, 2);
1441 if (res.err)
1442 return res.err;
1443 res = tb_cfg_reset(sw->tb->ctl, tb_route(sw));
1444 if (res.err > 0)
1445 return -EIO;
1446 return res.err;
1447}
1448
1449
1450
1451
1452
1453
1454
1455
1456static int tb_plug_events_active(struct tb_switch *sw, bool active)
1457{
1458 u32 data;
1459 int res;
1460
1461 if (tb_switch_is_icm(sw) || tb_switch_is_usb4(sw))
1462 return 0;
1463
1464 sw->config.plug_events_delay = 0xff;
1465 res = tb_sw_write(sw, ((u32 *) &sw->config) + 4, TB_CFG_SWITCH, 4, 1);
1466 if (res)
1467 return res;
1468
1469 res = tb_sw_read(sw, &data, TB_CFG_SWITCH, sw->cap_plug_events + 1, 1);
1470 if (res)
1471 return res;
1472
1473 if (active) {
1474 data = data & 0xFFFFFF83;
1475 switch (sw->config.device_id) {
1476 case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE:
1477 case PCI_DEVICE_ID_INTEL_EAGLE_RIDGE:
1478 case PCI_DEVICE_ID_INTEL_PORT_RIDGE:
1479 break;
1480 default:
1481 data |= 4;
1482 }
1483 } else {
1484 data = data | 0x7c;
1485 }
1486 return tb_sw_write(sw, &data, TB_CFG_SWITCH,
1487 sw->cap_plug_events + 1, 1);
1488}
1489
1490static ssize_t authorized_show(struct device *dev,
1491 struct device_attribute *attr,
1492 char *buf)
1493{
1494 struct tb_switch *sw = tb_to_switch(dev);
1495
1496 return sprintf(buf, "%u\n", sw->authorized);
1497}
1498
1499static int disapprove_switch(struct device *dev, void *not_used)
1500{
1501 struct tb_switch *sw;
1502
1503 sw = tb_to_switch(dev);
1504 if (sw && sw->authorized) {
1505 int ret;
1506
1507
1508 ret = device_for_each_child_reverse(&sw->dev, NULL, disapprove_switch);
1509 if (ret)
1510 return ret;
1511
1512 ret = tb_domain_disapprove_switch(sw->tb, sw);
1513 if (ret)
1514 return ret;
1515
1516 sw->authorized = 0;
1517 kobject_uevent(&sw->dev.kobj, KOBJ_CHANGE);
1518 }
1519
1520 return 0;
1521}
1522
1523static int tb_switch_set_authorized(struct tb_switch *sw, unsigned int val)
1524{
1525 int ret = -EINVAL;
1526
1527 if (!mutex_trylock(&sw->tb->lock))
1528 return restart_syscall();
1529
1530 if (!!sw->authorized == !!val)
1531 goto unlock;
1532
1533 switch (val) {
1534
1535 case 0:
1536 if (tb_route(sw)) {
1537 ret = disapprove_switch(&sw->dev, NULL);
1538 goto unlock;
1539 }
1540 break;
1541
1542
1543 case 1:
1544 if (sw->key)
1545 ret = tb_domain_approve_switch_key(sw->tb, sw);
1546 else
1547 ret = tb_domain_approve_switch(sw->tb, sw);
1548 break;
1549
1550
1551 case 2:
1552 if (sw->key)
1553 ret = tb_domain_challenge_switch_key(sw->tb, sw);
1554 break;
1555
1556 default:
1557 break;
1558 }
1559
1560 if (!ret) {
1561 sw->authorized = val;
1562
1563 kobject_uevent(&sw->dev.kobj, KOBJ_CHANGE);
1564 }
1565
1566unlock:
1567 mutex_unlock(&sw->tb->lock);
1568 return ret;
1569}
1570
1571static ssize_t authorized_store(struct device *dev,
1572 struct device_attribute *attr,
1573 const char *buf, size_t count)
1574{
1575 struct tb_switch *sw = tb_to_switch(dev);
1576 unsigned int val;
1577 ssize_t ret;
1578
1579 ret = kstrtouint(buf, 0, &val);
1580 if (ret)
1581 return ret;
1582 if (val > 2)
1583 return -EINVAL;
1584
1585 pm_runtime_get_sync(&sw->dev);
1586 ret = tb_switch_set_authorized(sw, val);
1587 pm_runtime_mark_last_busy(&sw->dev);
1588 pm_runtime_put_autosuspend(&sw->dev);
1589
1590 return ret ? ret : count;
1591}
1592static DEVICE_ATTR_RW(authorized);
1593
1594static ssize_t boot_show(struct device *dev, struct device_attribute *attr,
1595 char *buf)
1596{
1597 struct tb_switch *sw = tb_to_switch(dev);
1598
1599 return sprintf(buf, "%u\n", sw->boot);
1600}
1601static DEVICE_ATTR_RO(boot);
1602
1603static ssize_t device_show(struct device *dev, struct device_attribute *attr,
1604 char *buf)
1605{
1606 struct tb_switch *sw = tb_to_switch(dev);
1607
1608 return sprintf(buf, "%#x\n", sw->device);
1609}
1610static DEVICE_ATTR_RO(device);
1611
1612static ssize_t
1613device_name_show(struct device *dev, struct device_attribute *attr, char *buf)
1614{
1615 struct tb_switch *sw = tb_to_switch(dev);
1616
1617 return sprintf(buf, "%s\n", sw->device_name ? sw->device_name : "");
1618}
1619static DEVICE_ATTR_RO(device_name);
1620
1621static ssize_t
1622generation_show(struct device *dev, struct device_attribute *attr, char *buf)
1623{
1624 struct tb_switch *sw = tb_to_switch(dev);
1625
1626 return sprintf(buf, "%u\n", sw->generation);
1627}
1628static DEVICE_ATTR_RO(generation);
1629
1630static ssize_t key_show(struct device *dev, struct device_attribute *attr,
1631 char *buf)
1632{
1633 struct tb_switch *sw = tb_to_switch(dev);
1634 ssize_t ret;
1635
1636 if (!mutex_trylock(&sw->tb->lock))
1637 return restart_syscall();
1638
1639 if (sw->key)
1640 ret = sprintf(buf, "%*phN\n", TB_SWITCH_KEY_SIZE, sw->key);
1641 else
1642 ret = sprintf(buf, "\n");
1643
1644 mutex_unlock(&sw->tb->lock);
1645 return ret;
1646}
1647
1648static ssize_t key_store(struct device *dev, struct device_attribute *attr,
1649 const char *buf, size_t count)
1650{
1651 struct tb_switch *sw = tb_to_switch(dev);
1652 u8 key[TB_SWITCH_KEY_SIZE];
1653 ssize_t ret = count;
1654 bool clear = false;
1655
1656 if (!strcmp(buf, "\n"))
1657 clear = true;
1658 else if (hex2bin(key, buf, sizeof(key)))
1659 return -EINVAL;
1660
1661 if (!mutex_trylock(&sw->tb->lock))
1662 return restart_syscall();
1663
1664 if (sw->authorized) {
1665 ret = -EBUSY;
1666 } else {
1667 kfree(sw->key);
1668 if (clear) {
1669 sw->key = NULL;
1670 } else {
1671 sw->key = kmemdup(key, sizeof(key), GFP_KERNEL);
1672 if (!sw->key)
1673 ret = -ENOMEM;
1674 }
1675 }
1676
1677 mutex_unlock(&sw->tb->lock);
1678 return ret;
1679}
1680static DEVICE_ATTR(key, 0600, key_show, key_store);
1681
1682static ssize_t speed_show(struct device *dev, struct device_attribute *attr,
1683 char *buf)
1684{
1685 struct tb_switch *sw = tb_to_switch(dev);
1686
1687 return sprintf(buf, "%u.0 Gb/s\n", sw->link_speed);
1688}
1689
1690
1691
1692
1693
1694static DEVICE_ATTR(rx_speed, 0444, speed_show, NULL);
1695static DEVICE_ATTR(tx_speed, 0444, speed_show, NULL);
1696
1697static ssize_t lanes_show(struct device *dev, struct device_attribute *attr,
1698 char *buf)
1699{
1700 struct tb_switch *sw = tb_to_switch(dev);
1701
1702 return sprintf(buf, "%u\n", sw->link_width);
1703}
1704
1705
1706
1707
1708
1709static DEVICE_ATTR(rx_lanes, 0444, lanes_show, NULL);
1710static DEVICE_ATTR(tx_lanes, 0444, lanes_show, NULL);
1711
1712static ssize_t nvm_authenticate_show(struct device *dev,
1713 struct device_attribute *attr, char *buf)
1714{
1715 struct tb_switch *sw = tb_to_switch(dev);
1716 u32 status;
1717
1718 nvm_get_auth_status(sw, &status);
1719 return sprintf(buf, "%#x\n", status);
1720}
1721
1722static ssize_t nvm_authenticate_sysfs(struct device *dev, const char *buf,
1723 bool disconnect)
1724{
1725 struct tb_switch *sw = tb_to_switch(dev);
1726 int val, ret;
1727
1728 pm_runtime_get_sync(&sw->dev);
1729
1730 if (!mutex_trylock(&sw->tb->lock)) {
1731 ret = restart_syscall();
1732 goto exit_rpm;
1733 }
1734
1735
1736 if (!sw->nvm) {
1737 ret = -EAGAIN;
1738 goto exit_unlock;
1739 }
1740
1741 ret = kstrtoint(buf, 10, &val);
1742 if (ret)
1743 goto exit_unlock;
1744
1745
1746 nvm_clear_auth_status(sw);
1747
1748 if (val > 0) {
1749 if (val == AUTHENTICATE_ONLY) {
1750 if (disconnect)
1751 ret = -EINVAL;
1752 else
1753 ret = nvm_authenticate(sw, true);
1754 } else {
1755 if (!sw->nvm->flushed) {
1756 if (!sw->nvm->buf) {
1757 ret = -EINVAL;
1758 goto exit_unlock;
1759 }
1760
1761 ret = nvm_validate_and_write(sw);
1762 if (ret || val == WRITE_ONLY)
1763 goto exit_unlock;
1764 }
1765 if (val == WRITE_AND_AUTHENTICATE) {
1766 if (disconnect)
1767 ret = tb_lc_force_power(sw);
1768 else
1769 ret = nvm_authenticate(sw, false);
1770 }
1771 }
1772 }
1773
1774exit_unlock:
1775 mutex_unlock(&sw->tb->lock);
1776exit_rpm:
1777 pm_runtime_mark_last_busy(&sw->dev);
1778 pm_runtime_put_autosuspend(&sw->dev);
1779
1780 return ret;
1781}
1782
1783static ssize_t nvm_authenticate_store(struct device *dev,
1784 struct device_attribute *attr, const char *buf, size_t count)
1785{
1786 int ret = nvm_authenticate_sysfs(dev, buf, false);
1787 if (ret)
1788 return ret;
1789 return count;
1790}
1791static DEVICE_ATTR_RW(nvm_authenticate);
1792
1793static ssize_t nvm_authenticate_on_disconnect_show(struct device *dev,
1794 struct device_attribute *attr, char *buf)
1795{
1796 return nvm_authenticate_show(dev, attr, buf);
1797}
1798
1799static ssize_t nvm_authenticate_on_disconnect_store(struct device *dev,
1800 struct device_attribute *attr, const char *buf, size_t count)
1801{
1802 int ret;
1803
1804 ret = nvm_authenticate_sysfs(dev, buf, true);
1805 return ret ? ret : count;
1806}
1807static DEVICE_ATTR_RW(nvm_authenticate_on_disconnect);
1808
1809static ssize_t nvm_version_show(struct device *dev,
1810 struct device_attribute *attr, char *buf)
1811{
1812 struct tb_switch *sw = tb_to_switch(dev);
1813 int ret;
1814
1815 if (!mutex_trylock(&sw->tb->lock))
1816 return restart_syscall();
1817
1818 if (sw->safe_mode)
1819 ret = -ENODATA;
1820 else if (!sw->nvm)
1821 ret = -EAGAIN;
1822 else
1823 ret = sprintf(buf, "%x.%x\n", sw->nvm->major, sw->nvm->minor);
1824
1825 mutex_unlock(&sw->tb->lock);
1826
1827 return ret;
1828}
1829static DEVICE_ATTR_RO(nvm_version);
1830
1831static ssize_t vendor_show(struct device *dev, struct device_attribute *attr,
1832 char *buf)
1833{
1834 struct tb_switch *sw = tb_to_switch(dev);
1835
1836 return sprintf(buf, "%#x\n", sw->vendor);
1837}
1838static DEVICE_ATTR_RO(vendor);
1839
1840static ssize_t
1841vendor_name_show(struct device *dev, struct device_attribute *attr, char *buf)
1842{
1843 struct tb_switch *sw = tb_to_switch(dev);
1844
1845 return sprintf(buf, "%s\n", sw->vendor_name ? sw->vendor_name : "");
1846}
1847static DEVICE_ATTR_RO(vendor_name);
1848
1849static ssize_t unique_id_show(struct device *dev, struct device_attribute *attr,
1850 char *buf)
1851{
1852 struct tb_switch *sw = tb_to_switch(dev);
1853
1854 return sprintf(buf, "%pUb\n", sw->uuid);
1855}
1856static DEVICE_ATTR_RO(unique_id);
1857
1858static struct attribute *switch_attrs[] = {
1859 &dev_attr_authorized.attr,
1860 &dev_attr_boot.attr,
1861 &dev_attr_device.attr,
1862 &dev_attr_device_name.attr,
1863 &dev_attr_generation.attr,
1864 &dev_attr_key.attr,
1865 &dev_attr_nvm_authenticate.attr,
1866 &dev_attr_nvm_authenticate_on_disconnect.attr,
1867 &dev_attr_nvm_version.attr,
1868 &dev_attr_rx_speed.attr,
1869 &dev_attr_rx_lanes.attr,
1870 &dev_attr_tx_speed.attr,
1871 &dev_attr_tx_lanes.attr,
1872 &dev_attr_vendor.attr,
1873 &dev_attr_vendor_name.attr,
1874 &dev_attr_unique_id.attr,
1875 NULL,
1876};
1877
1878static umode_t switch_attr_is_visible(struct kobject *kobj,
1879 struct attribute *attr, int n)
1880{
1881 struct device *dev = kobj_to_dev(kobj);
1882 struct tb_switch *sw = tb_to_switch(dev);
1883
1884 if (attr == &dev_attr_authorized.attr) {
1885 if (sw->tb->security_level == TB_SECURITY_NOPCIE ||
1886 sw->tb->security_level == TB_SECURITY_DPONLY)
1887 return 0;
1888 } else if (attr == &dev_attr_device.attr) {
1889 if (!sw->device)
1890 return 0;
1891 } else if (attr == &dev_attr_device_name.attr) {
1892 if (!sw->device_name)
1893 return 0;
1894 } else if (attr == &dev_attr_vendor.attr) {
1895 if (!sw->vendor)
1896 return 0;
1897 } else if (attr == &dev_attr_vendor_name.attr) {
1898 if (!sw->vendor_name)
1899 return 0;
1900 } else if (attr == &dev_attr_key.attr) {
1901 if (tb_route(sw) &&
1902 sw->tb->security_level == TB_SECURITY_SECURE &&
1903 sw->security_level == TB_SECURITY_SECURE)
1904 return attr->mode;
1905 return 0;
1906 } else if (attr == &dev_attr_rx_speed.attr ||
1907 attr == &dev_attr_rx_lanes.attr ||
1908 attr == &dev_attr_tx_speed.attr ||
1909 attr == &dev_attr_tx_lanes.attr) {
1910 if (tb_route(sw))
1911 return attr->mode;
1912 return 0;
1913 } else if (attr == &dev_attr_nvm_authenticate.attr) {
1914 if (nvm_upgradeable(sw))
1915 return attr->mode;
1916 return 0;
1917 } else if (attr == &dev_attr_nvm_version.attr) {
1918 if (nvm_readable(sw))
1919 return attr->mode;
1920 return 0;
1921 } else if (attr == &dev_attr_boot.attr) {
1922 if (tb_route(sw))
1923 return attr->mode;
1924 return 0;
1925 } else if (attr == &dev_attr_nvm_authenticate_on_disconnect.attr) {
1926 if (sw->quirks & QUIRK_FORCE_POWER_LINK_CONTROLLER)
1927 return attr->mode;
1928 return 0;
1929 }
1930
1931 return sw->safe_mode ? 0 : attr->mode;
1932}
1933
1934static const struct attribute_group switch_group = {
1935 .is_visible = switch_attr_is_visible,
1936 .attrs = switch_attrs,
1937};
1938
1939static const struct attribute_group *switch_groups[] = {
1940 &switch_group,
1941 NULL,
1942};
1943
1944static void tb_switch_release(struct device *dev)
1945{
1946 struct tb_switch *sw = tb_to_switch(dev);
1947 struct tb_port *port;
1948
1949 dma_port_free(sw->dma_port);
1950
1951 tb_switch_for_each_port(sw, port) {
1952 ida_destroy(&port->in_hopids);
1953 ida_destroy(&port->out_hopids);
1954 }
1955
1956 kfree(sw->uuid);
1957 kfree(sw->device_name);
1958 kfree(sw->vendor_name);
1959 kfree(sw->ports);
1960 kfree(sw->drom);
1961 kfree(sw->key);
1962 kfree(sw);
1963}
1964
1965static int tb_switch_uevent(struct device *dev, struct kobj_uevent_env *env)
1966{
1967 struct tb_switch *sw = tb_to_switch(dev);
1968 const char *type;
1969
1970 if (sw->config.thunderbolt_version == USB4_VERSION_1_0) {
1971 if (add_uevent_var(env, "USB4_VERSION=1.0"))
1972 return -ENOMEM;
1973 }
1974
1975 if (!tb_route(sw)) {
1976 type = "host";
1977 } else {
1978 const struct tb_port *port;
1979 bool hub = false;
1980
1981
1982 tb_switch_for_each_port(sw, port) {
1983 if (!port->disabled && !tb_is_upstream_port(port) &&
1984 tb_port_is_null(port)) {
1985 hub = true;
1986 break;
1987 }
1988 }
1989
1990 type = hub ? "hub" : "device";
1991 }
1992
1993 if (add_uevent_var(env, "USB4_TYPE=%s", type))
1994 return -ENOMEM;
1995 return 0;
1996}
1997
1998
1999
2000
2001
2002static int __maybe_unused tb_switch_runtime_suspend(struct device *dev)
2003{
2004 struct tb_switch *sw = tb_to_switch(dev);
2005 const struct tb_cm_ops *cm_ops = sw->tb->cm_ops;
2006
2007 if (cm_ops->runtime_suspend_switch)
2008 return cm_ops->runtime_suspend_switch(sw);
2009
2010 return 0;
2011}
2012
2013static int __maybe_unused tb_switch_runtime_resume(struct device *dev)
2014{
2015 struct tb_switch *sw = tb_to_switch(dev);
2016 const struct tb_cm_ops *cm_ops = sw->tb->cm_ops;
2017
2018 if (cm_ops->runtime_resume_switch)
2019 return cm_ops->runtime_resume_switch(sw);
2020 return 0;
2021}
2022
2023static const struct dev_pm_ops tb_switch_pm_ops = {
2024 SET_RUNTIME_PM_OPS(tb_switch_runtime_suspend, tb_switch_runtime_resume,
2025 NULL)
2026};
2027
2028struct device_type tb_switch_type = {
2029 .name = "thunderbolt_device",
2030 .release = tb_switch_release,
2031 .uevent = tb_switch_uevent,
2032 .pm = &tb_switch_pm_ops,
2033};
2034
2035static int tb_switch_get_generation(struct tb_switch *sw)
2036{
2037 switch (sw->config.device_id) {
2038 case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE:
2039 case PCI_DEVICE_ID_INTEL_EAGLE_RIDGE:
2040 case PCI_DEVICE_ID_INTEL_LIGHT_PEAK:
2041 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C:
2042 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C:
2043 case PCI_DEVICE_ID_INTEL_PORT_RIDGE:
2044 case PCI_DEVICE_ID_INTEL_REDWOOD_RIDGE_2C_BRIDGE:
2045 case PCI_DEVICE_ID_INTEL_REDWOOD_RIDGE_4C_BRIDGE:
2046 return 1;
2047
2048 case PCI_DEVICE_ID_INTEL_WIN_RIDGE_2C_BRIDGE:
2049 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE:
2050 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE:
2051 return 2;
2052
2053 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
2054 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
2055 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE:
2056 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
2057 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
2058 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_BRIDGE:
2059 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_BRIDGE:
2060 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_BRIDGE:
2061 case PCI_DEVICE_ID_INTEL_ICL_NHI0:
2062 case PCI_DEVICE_ID_INTEL_ICL_NHI1:
2063 return 3;
2064
2065 default:
2066 if (tb_switch_is_usb4(sw))
2067 return 4;
2068
2069
2070
2071
2072
2073 tb_sw_warn(sw, "unsupported switch device id %#x\n",
2074 sw->config.device_id);
2075 return 1;
2076 }
2077}
2078
2079static bool tb_switch_exceeds_max_depth(const struct tb_switch *sw, int depth)
2080{
2081 int max_depth;
2082
2083 if (tb_switch_is_usb4(sw) ||
2084 (sw->tb->root_switch && tb_switch_is_usb4(sw->tb->root_switch)))
2085 max_depth = USB4_SWITCH_MAX_DEPTH;
2086 else
2087 max_depth = TB_SWITCH_MAX_DEPTH;
2088
2089 return depth > max_depth;
2090}
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
2107 u64 route)
2108{
2109 struct tb_switch *sw;
2110 int upstream_port;
2111 int i, ret, depth;
2112
2113
2114 if (route) {
2115 struct tb_switch *parent_sw = tb_to_switch(parent);
2116 struct tb_port *down;
2117
2118 down = tb_port_at(route, parent_sw);
2119 tb_port_unlock(down);
2120 }
2121
2122 depth = tb_route_length(route);
2123
2124 upstream_port = tb_cfg_get_upstream_port(tb->ctl, route);
2125 if (upstream_port < 0)
2126 return ERR_PTR(upstream_port);
2127
2128 sw = kzalloc(sizeof(*sw), GFP_KERNEL);
2129 if (!sw)
2130 return ERR_PTR(-ENOMEM);
2131
2132 sw->tb = tb;
2133 ret = tb_cfg_read(tb->ctl, &sw->config, route, 0, TB_CFG_SWITCH, 0, 5);
2134 if (ret)
2135 goto err_free_sw_ports;
2136
2137 sw->generation = tb_switch_get_generation(sw);
2138
2139 tb_dbg(tb, "current switch config:\n");
2140 tb_dump_switch(tb, sw);
2141
2142
2143 sw->config.upstream_port_number = upstream_port;
2144 sw->config.depth = depth;
2145 sw->config.route_hi = upper_32_bits(route);
2146 sw->config.route_lo = lower_32_bits(route);
2147 sw->config.enabled = 0;
2148
2149
2150 if (tb_switch_exceeds_max_depth(sw, depth)) {
2151 ret = -EADDRNOTAVAIL;
2152 goto err_free_sw_ports;
2153 }
2154
2155
2156 sw->ports = kcalloc(sw->config.max_port_number + 1, sizeof(*sw->ports),
2157 GFP_KERNEL);
2158 if (!sw->ports) {
2159 ret = -ENOMEM;
2160 goto err_free_sw_ports;
2161 }
2162
2163 for (i = 0; i <= sw->config.max_port_number; i++) {
2164
2165 sw->ports[i].sw = sw;
2166 sw->ports[i].port = i;
2167
2168
2169 if (i) {
2170 ida_init(&sw->ports[i].in_hopids);
2171 ida_init(&sw->ports[i].out_hopids);
2172 }
2173 }
2174
2175 ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_PLUG_EVENTS);
2176 if (ret > 0)
2177 sw->cap_plug_events = ret;
2178
2179 ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_LINK_CONTROLLER);
2180 if (ret > 0)
2181 sw->cap_lc = ret;
2182
2183
2184 if (!route)
2185 sw->authorized = true;
2186
2187 device_initialize(&sw->dev);
2188 sw->dev.parent = parent;
2189 sw->dev.bus = &tb_bus_type;
2190 sw->dev.type = &tb_switch_type;
2191 sw->dev.groups = switch_groups;
2192 dev_set_name(&sw->dev, "%u-%llx", tb->index, tb_route(sw));
2193
2194 return sw;
2195
2196err_free_sw_ports:
2197 kfree(sw->ports);
2198 kfree(sw);
2199
2200 return ERR_PTR(ret);
2201}
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217struct tb_switch *
2218tb_switch_alloc_safe_mode(struct tb *tb, struct device *parent, u64 route)
2219{
2220 struct tb_switch *sw;
2221
2222 sw = kzalloc(sizeof(*sw), GFP_KERNEL);
2223 if (!sw)
2224 return ERR_PTR(-ENOMEM);
2225
2226 sw->tb = tb;
2227 sw->config.depth = tb_route_length(route);
2228 sw->config.route_hi = upper_32_bits(route);
2229 sw->config.route_lo = lower_32_bits(route);
2230 sw->safe_mode = true;
2231
2232 device_initialize(&sw->dev);
2233 sw->dev.parent = parent;
2234 sw->dev.bus = &tb_bus_type;
2235 sw->dev.type = &tb_switch_type;
2236 sw->dev.groups = switch_groups;
2237 dev_set_name(&sw->dev, "%u-%llx", tb->index, tb_route(sw));
2238
2239 return sw;
2240}
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253int tb_switch_configure(struct tb_switch *sw)
2254{
2255 struct tb *tb = sw->tb;
2256 u64 route;
2257 int ret;
2258
2259 route = tb_route(sw);
2260
2261 tb_dbg(tb, "%s Switch at %#llx (depth: %d, up port: %d)\n",
2262 sw->config.enabled ? "restoring" : "initializing", route,
2263 tb_route_length(route), sw->config.upstream_port_number);
2264
2265 sw->config.enabled = 1;
2266
2267 if (tb_switch_is_usb4(sw)) {
2268
2269
2270
2271
2272
2273 sw->config.cmuv = USB4_VERSION_1_0;
2274
2275
2276 ret = tb_sw_write(sw, (u32 *)&sw->config + 1, TB_CFG_SWITCH,
2277 ROUTER_CS_1, 4);
2278 if (ret)
2279 return ret;
2280
2281 ret = usb4_switch_setup(sw);
2282 } else {
2283 if (sw->config.vendor_id != PCI_VENDOR_ID_INTEL)
2284 tb_sw_warn(sw, "unknown switch vendor id %#x\n",
2285 sw->config.vendor_id);
2286
2287 if (!sw->cap_plug_events) {
2288 tb_sw_warn(sw, "cannot find TB_VSE_CAP_PLUG_EVENTS aborting\n");
2289 return -ENODEV;
2290 }
2291
2292
2293 ret = tb_sw_write(sw, (u32 *)&sw->config + 1, TB_CFG_SWITCH,
2294 ROUTER_CS_1, 3);
2295 }
2296 if (ret)
2297 return ret;
2298
2299 return tb_plug_events_active(sw, true);
2300}
2301
2302static int tb_switch_set_uuid(struct tb_switch *sw)
2303{
2304 bool uid = false;
2305 u32 uuid[4];
2306 int ret;
2307
2308 if (sw->uuid)
2309 return 0;
2310
2311 if (tb_switch_is_usb4(sw)) {
2312 ret = usb4_switch_read_uid(sw, &sw->uid);
2313 if (ret)
2314 return ret;
2315 uid = true;
2316 } else {
2317
2318
2319
2320
2321 ret = tb_lc_read_uuid(sw, uuid);
2322 if (ret) {
2323 if (ret != -EINVAL)
2324 return ret;
2325 uid = true;
2326 }
2327 }
2328
2329 if (uid) {
2330
2331
2332
2333
2334
2335
2336 uuid[0] = sw->uid & 0xffffffff;
2337 uuid[1] = (sw->uid >> 32) & 0xffffffff;
2338 uuid[2] = 0xffffffff;
2339 uuid[3] = 0xffffffff;
2340 }
2341
2342 sw->uuid = kmemdup(uuid, sizeof(uuid), GFP_KERNEL);
2343 if (!sw->uuid)
2344 return -ENOMEM;
2345 return 0;
2346}
2347
2348static int tb_switch_add_dma_port(struct tb_switch *sw)
2349{
2350 u32 status;
2351 int ret;
2352
2353 switch (sw->generation) {
2354 case 2:
2355
2356 if (tb_route(sw))
2357 return 0;
2358
2359 fallthrough;
2360 case 3:
2361 case 4:
2362 ret = tb_switch_set_uuid(sw);
2363 if (ret)
2364 return ret;
2365 break;
2366
2367 default:
2368
2369
2370
2371
2372 if (!sw->safe_mode)
2373 return 0;
2374 break;
2375 }
2376
2377 if (sw->no_nvm_upgrade)
2378 return 0;
2379
2380 if (tb_switch_is_usb4(sw)) {
2381 ret = usb4_switch_nvm_authenticate_status(sw, &status);
2382 if (ret)
2383 return ret;
2384
2385 if (status) {
2386 tb_sw_info(sw, "switch flash authentication failed\n");
2387 nvm_set_auth_status(sw, status);
2388 }
2389
2390 return 0;
2391 }
2392
2393
2394 if (!tb_route(sw) && !tb_switch_is_icm(sw))
2395 return 0;
2396
2397 sw->dma_port = dma_port_alloc(sw);
2398 if (!sw->dma_port)
2399 return 0;
2400
2401
2402
2403
2404
2405
2406
2407 nvm_get_auth_status(sw, &status);
2408 if (status) {
2409 if (!tb_route(sw))
2410 nvm_authenticate_complete_dma_port(sw);
2411 return 0;
2412 }
2413
2414
2415
2416
2417
2418
2419 ret = dma_port_flash_update_auth_status(sw->dma_port, &status);
2420 if (ret <= 0)
2421 return ret;
2422
2423
2424 if (!tb_route(sw))
2425 nvm_authenticate_complete_dma_port(sw);
2426
2427 if (status) {
2428 tb_sw_info(sw, "switch flash authentication failed\n");
2429 nvm_set_auth_status(sw, status);
2430 }
2431
2432 tb_sw_info(sw, "power cycling the switch now\n");
2433 dma_port_power_cycle(sw->dma_port);
2434
2435
2436
2437
2438
2439 return -ESHUTDOWN;
2440}
2441
2442static void tb_switch_default_link_ports(struct tb_switch *sw)
2443{
2444 int i;
2445
2446 for (i = 1; i <= sw->config.max_port_number; i += 2) {
2447 struct tb_port *port = &sw->ports[i];
2448 struct tb_port *subordinate;
2449
2450 if (!tb_port_is_null(port))
2451 continue;
2452
2453
2454 if (i == sw->config.max_port_number ||
2455 !tb_port_is_null(&sw->ports[i + 1]))
2456 continue;
2457
2458
2459 subordinate = &sw->ports[i + 1];
2460 if (!port->dual_link_port && !subordinate->dual_link_port) {
2461 port->link_nr = 0;
2462 port->dual_link_port = subordinate;
2463 subordinate->link_nr = 1;
2464 subordinate->dual_link_port = port;
2465
2466 tb_sw_dbg(sw, "linked ports %d <-> %d\n",
2467 port->port, subordinate->port);
2468 }
2469 }
2470}
2471
2472static bool tb_switch_lane_bonding_possible(struct tb_switch *sw)
2473{
2474 const struct tb_port *up = tb_upstream_port(sw);
2475
2476 if (!up->dual_link_port || !up->dual_link_port->remote)
2477 return false;
2478
2479 if (tb_switch_is_usb4(sw))
2480 return usb4_switch_lane_bonding_possible(sw);
2481 return tb_lc_lane_bonding_possible(sw);
2482}
2483
2484static int tb_switch_update_link_attributes(struct tb_switch *sw)
2485{
2486 struct tb_port *up;
2487 bool change = false;
2488 int ret;
2489
2490 if (!tb_route(sw) || tb_switch_is_icm(sw))
2491 return 0;
2492
2493 up = tb_upstream_port(sw);
2494
2495 ret = tb_port_get_link_speed(up);
2496 if (ret < 0)
2497 return ret;
2498 if (sw->link_speed != ret)
2499 change = true;
2500 sw->link_speed = ret;
2501
2502 ret = tb_port_get_link_width(up);
2503 if (ret < 0)
2504 return ret;
2505 if (sw->link_width != ret)
2506 change = true;
2507 sw->link_width = ret;
2508
2509
2510 if (device_is_registered(&sw->dev) && change)
2511 kobject_uevent(&sw->dev.kobj, KOBJ_CHANGE);
2512
2513 return 0;
2514}
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524int tb_switch_lane_bonding_enable(struct tb_switch *sw)
2525{
2526 struct tb_switch *parent = tb_to_switch(sw->dev.parent);
2527 struct tb_port *up, *down;
2528 u64 route = tb_route(sw);
2529 int ret;
2530
2531 if (!route)
2532 return 0;
2533
2534 if (!tb_switch_lane_bonding_possible(sw))
2535 return 0;
2536
2537 up = tb_upstream_port(sw);
2538 down = tb_port_at(route, parent);
2539
2540 if (!tb_port_is_width_supported(up, 2) ||
2541 !tb_port_is_width_supported(down, 2))
2542 return 0;
2543
2544 ret = tb_port_lane_bonding_enable(up);
2545 if (ret) {
2546 tb_port_warn(up, "failed to enable lane bonding\n");
2547 return ret;
2548 }
2549
2550 ret = tb_port_lane_bonding_enable(down);
2551 if (ret) {
2552 tb_port_warn(down, "failed to enable lane bonding\n");
2553 tb_port_lane_bonding_disable(up);
2554 return ret;
2555 }
2556
2557 ret = tb_port_wait_for_link_width(down, 2, 100);
2558 if (ret) {
2559 tb_port_warn(down, "timeout enabling lane bonding\n");
2560 return ret;
2561 }
2562
2563 tb_port_update_credits(down);
2564 tb_port_update_credits(up);
2565 tb_switch_update_link_attributes(sw);
2566
2567 tb_sw_dbg(sw, "lane bonding enabled\n");
2568 return ret;
2569}
2570
2571
2572
2573
2574
2575
2576
2577
2578void tb_switch_lane_bonding_disable(struct tb_switch *sw)
2579{
2580 struct tb_switch *parent = tb_to_switch(sw->dev.parent);
2581 struct tb_port *up, *down;
2582
2583 if (!tb_route(sw))
2584 return;
2585
2586 up = tb_upstream_port(sw);
2587 if (!up->bonded)
2588 return;
2589
2590 down = tb_port_at(tb_route(sw), parent);
2591
2592 tb_port_lane_bonding_disable(up);
2593 tb_port_lane_bonding_disable(down);
2594
2595
2596
2597
2598
2599 if (tb_port_wait_for_link_width(down, 1, 100) == -ETIMEDOUT)
2600 tb_sw_warn(sw, "timeout disabling lane bonding\n");
2601
2602 tb_port_update_credits(down);
2603 tb_port_update_credits(up);
2604 tb_switch_update_link_attributes(sw);
2605
2606 tb_sw_dbg(sw, "lane bonding disabled\n");
2607}
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621int tb_switch_configure_link(struct tb_switch *sw)
2622{
2623 struct tb_port *up, *down;
2624 int ret;
2625
2626 if (!tb_route(sw) || tb_switch_is_icm(sw))
2627 return 0;
2628
2629 up = tb_upstream_port(sw);
2630 if (tb_switch_is_usb4(up->sw))
2631 ret = usb4_port_configure(up);
2632 else
2633 ret = tb_lc_configure_port(up);
2634 if (ret)
2635 return ret;
2636
2637 down = up->remote;
2638 if (tb_switch_is_usb4(down->sw))
2639 return usb4_port_configure(down);
2640 return tb_lc_configure_port(down);
2641}
2642
2643
2644
2645
2646
2647
2648
2649
2650void tb_switch_unconfigure_link(struct tb_switch *sw)
2651{
2652 struct tb_port *up, *down;
2653
2654 if (sw->is_unplugged)
2655 return;
2656 if (!tb_route(sw) || tb_switch_is_icm(sw))
2657 return;
2658
2659 up = tb_upstream_port(sw);
2660 if (tb_switch_is_usb4(up->sw))
2661 usb4_port_unconfigure(up);
2662 else
2663 tb_lc_unconfigure_port(up);
2664
2665 down = up->remote;
2666 if (tb_switch_is_usb4(down->sw))
2667 usb4_port_unconfigure(down);
2668 else
2669 tb_lc_unconfigure_port(down);
2670}
2671
2672static void tb_switch_credits_init(struct tb_switch *sw)
2673{
2674 if (tb_switch_is_icm(sw))
2675 return;
2676 if (!tb_switch_is_usb4(sw))
2677 return;
2678 if (usb4_switch_credits_init(sw))
2679 tb_sw_info(sw, "failed to determine preferred buffer allocation, using defaults\n");
2680}
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694int tb_switch_add(struct tb_switch *sw)
2695{
2696 int i, ret;
2697
2698
2699
2700
2701
2702
2703
2704
2705 ret = tb_switch_add_dma_port(sw);
2706 if (ret) {
2707 dev_err(&sw->dev, "failed to add DMA port\n");
2708 return ret;
2709 }
2710
2711 if (!sw->safe_mode) {
2712 tb_switch_credits_init(sw);
2713
2714
2715 ret = tb_drom_read(sw);
2716 if (ret) {
2717 dev_err(&sw->dev, "reading DROM failed\n");
2718 return ret;
2719 }
2720 tb_sw_dbg(sw, "uid: %#llx\n", sw->uid);
2721
2722 tb_check_quirks(sw);
2723
2724 ret = tb_switch_set_uuid(sw);
2725 if (ret) {
2726 dev_err(&sw->dev, "failed to set UUID\n");
2727 return ret;
2728 }
2729
2730 for (i = 0; i <= sw->config.max_port_number; i++) {
2731 if (sw->ports[i].disabled) {
2732 tb_port_dbg(&sw->ports[i], "disabled by eeprom\n");
2733 continue;
2734 }
2735 ret = tb_init_port(&sw->ports[i]);
2736 if (ret) {
2737 dev_err(&sw->dev, "failed to initialize port %d\n", i);
2738 return ret;
2739 }
2740 }
2741
2742 tb_switch_default_link_ports(sw);
2743
2744 ret = tb_switch_update_link_attributes(sw);
2745 if (ret)
2746 return ret;
2747
2748 ret = tb_switch_tmu_init(sw);
2749 if (ret)
2750 return ret;
2751 }
2752
2753 ret = device_add(&sw->dev);
2754 if (ret) {
2755 dev_err(&sw->dev, "failed to add device: %d\n", ret);
2756 return ret;
2757 }
2758
2759 if (tb_route(sw)) {
2760 dev_info(&sw->dev, "new device found, vendor=%#x device=%#x\n",
2761 sw->vendor, sw->device);
2762 if (sw->vendor_name && sw->device_name)
2763 dev_info(&sw->dev, "%s %s\n", sw->vendor_name,
2764 sw->device_name);
2765 }
2766
2767 ret = usb4_switch_add_ports(sw);
2768 if (ret) {
2769 dev_err(&sw->dev, "failed to add USB4 ports\n");
2770 goto err_del;
2771 }
2772
2773 ret = tb_switch_nvm_add(sw);
2774 if (ret) {
2775 dev_err(&sw->dev, "failed to add NVM devices\n");
2776 goto err_ports;
2777 }
2778
2779
2780
2781
2782
2783
2784 device_init_wakeup(&sw->dev, true);
2785
2786 pm_runtime_set_active(&sw->dev);
2787 if (sw->rpm) {
2788 pm_runtime_set_autosuspend_delay(&sw->dev, TB_AUTOSUSPEND_DELAY);
2789 pm_runtime_use_autosuspend(&sw->dev);
2790 pm_runtime_mark_last_busy(&sw->dev);
2791 pm_runtime_enable(&sw->dev);
2792 pm_request_autosuspend(&sw->dev);
2793 }
2794
2795 tb_switch_debugfs_init(sw);
2796 return 0;
2797
2798err_ports:
2799 usb4_switch_remove_ports(sw);
2800err_del:
2801 device_del(&sw->dev);
2802
2803 return ret;
2804}
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814void tb_switch_remove(struct tb_switch *sw)
2815{
2816 struct tb_port *port;
2817
2818 tb_switch_debugfs_remove(sw);
2819
2820 if (sw->rpm) {
2821 pm_runtime_get_sync(&sw->dev);
2822 pm_runtime_disable(&sw->dev);
2823 }
2824
2825
2826 tb_switch_for_each_port(sw, port) {
2827 if (tb_port_has_remote(port)) {
2828 tb_switch_remove(port->remote->sw);
2829 port->remote = NULL;
2830 } else if (port->xdomain) {
2831 tb_xdomain_remove(port->xdomain);
2832 port->xdomain = NULL;
2833 }
2834
2835
2836 tb_retimer_remove_all(port);
2837 }
2838
2839 if (!sw->is_unplugged)
2840 tb_plug_events_active(sw, false);
2841
2842 tb_switch_nvm_remove(sw);
2843 usb4_switch_remove_ports(sw);
2844
2845 if (tb_route(sw))
2846 dev_info(&sw->dev, "device disconnected\n");
2847 device_unregister(&sw->dev);
2848}
2849
2850
2851
2852
2853
2854void tb_sw_set_unplugged(struct tb_switch *sw)
2855{
2856 struct tb_port *port;
2857
2858 if (sw == sw->tb->root_switch) {
2859 tb_sw_WARN(sw, "cannot unplug root switch\n");
2860 return;
2861 }
2862 if (sw->is_unplugged) {
2863 tb_sw_WARN(sw, "is_unplugged already set\n");
2864 return;
2865 }
2866 sw->is_unplugged = true;
2867 tb_switch_for_each_port(sw, port) {
2868 if (tb_port_has_remote(port))
2869 tb_sw_set_unplugged(port->remote->sw);
2870 else if (port->xdomain)
2871 port->xdomain->is_unplugged = true;
2872 }
2873}
2874
2875static int tb_switch_set_wake(struct tb_switch *sw, unsigned int flags)
2876{
2877 if (flags)
2878 tb_sw_dbg(sw, "enabling wakeup: %#x\n", flags);
2879 else
2880 tb_sw_dbg(sw, "disabling wakeup\n");
2881
2882 if (tb_switch_is_usb4(sw))
2883 return usb4_switch_set_wake(sw, flags);
2884 return tb_lc_set_wake(sw, flags);
2885}
2886
2887int tb_switch_resume(struct tb_switch *sw)
2888{
2889 struct tb_port *port;
2890 int err;
2891
2892 tb_sw_dbg(sw, "resuming switch\n");
2893
2894
2895
2896
2897
2898 if (tb_route(sw)) {
2899 u64 uid;
2900
2901
2902
2903
2904
2905
2906 err = tb_cfg_get_upstream_port(sw->tb->ctl, tb_route(sw));
2907 if (err < 0) {
2908 tb_sw_info(sw, "switch not present anymore\n");
2909 return err;
2910 }
2911
2912 if (tb_switch_is_usb4(sw))
2913 err = usb4_switch_read_uid(sw, &uid);
2914 else
2915 err = tb_drom_read_uid_only(sw, &uid);
2916 if (err) {
2917 tb_sw_warn(sw, "uid read failed\n");
2918 return err;
2919 }
2920 if (sw->uid != uid) {
2921 tb_sw_info(sw,
2922 "changed while suspended (uid %#llx -> %#llx)\n",
2923 sw->uid, uid);
2924 return -ENODEV;
2925 }
2926 }
2927
2928 err = tb_switch_configure(sw);
2929 if (err)
2930 return err;
2931
2932
2933 tb_switch_set_wake(sw, 0);
2934
2935 err = tb_switch_tmu_init(sw);
2936 if (err)
2937 return err;
2938
2939
2940 tb_switch_for_each_port(sw, port) {
2941 if (!tb_port_is_null(port))
2942 continue;
2943
2944 if (!tb_port_resume(port))
2945 continue;
2946
2947 if (tb_wait_for_port(port, true) <= 0) {
2948 tb_port_warn(port,
2949 "lost during suspend, disconnecting\n");
2950 if (tb_port_has_remote(port))
2951 tb_sw_set_unplugged(port->remote->sw);
2952 else if (port->xdomain)
2953 port->xdomain->is_unplugged = true;
2954 } else {
2955
2956
2957
2958
2959 if (tb_port_unlock(port))
2960 tb_port_warn(port, "failed to unlock port\n");
2961 if (port->remote && tb_switch_resume(port->remote->sw)) {
2962 tb_port_warn(port,
2963 "lost during suspend, disconnecting\n");
2964 tb_sw_set_unplugged(port->remote->sw);
2965 }
2966 }
2967 }
2968 return 0;
2969}
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981void tb_switch_suspend(struct tb_switch *sw, bool runtime)
2982{
2983 unsigned int flags = 0;
2984 struct tb_port *port;
2985 int err;
2986
2987 tb_sw_dbg(sw, "suspending switch\n");
2988
2989 err = tb_plug_events_active(sw, false);
2990 if (err)
2991 return;
2992
2993 tb_switch_for_each_port(sw, port) {
2994 if (tb_port_has_remote(port))
2995 tb_switch_suspend(port->remote->sw, runtime);
2996 }
2997
2998 if (runtime) {
2999
3000 flags |= TB_WAKE_ON_CONNECT | TB_WAKE_ON_DISCONNECT;
3001 flags |= TB_WAKE_ON_USB4;
3002 flags |= TB_WAKE_ON_USB3 | TB_WAKE_ON_PCIE | TB_WAKE_ON_DP;
3003 } else if (device_may_wakeup(&sw->dev)) {
3004 flags |= TB_WAKE_ON_USB4 | TB_WAKE_ON_USB3 | TB_WAKE_ON_PCIE;
3005 }
3006
3007 tb_switch_set_wake(sw, flags);
3008
3009 if (tb_switch_is_usb4(sw))
3010 usb4_switch_set_sleep(sw);
3011 else
3012 tb_lc_set_sleep(sw);
3013}
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023bool tb_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in)
3024{
3025 if (tb_switch_is_usb4(sw))
3026 return usb4_switch_query_dp_resource(sw, in);
3027 return tb_lc_dp_sink_query(sw, in);
3028}
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039int tb_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
3040{
3041 if (tb_switch_is_usb4(sw))
3042 return usb4_switch_alloc_dp_resource(sw, in);
3043 return tb_lc_dp_sink_alloc(sw, in);
3044}
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054void tb_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
3055{
3056 int ret;
3057
3058 if (tb_switch_is_usb4(sw))
3059 ret = usb4_switch_dealloc_dp_resource(sw, in);
3060 else
3061 ret = tb_lc_dp_sink_dealloc(sw, in);
3062
3063 if (ret)
3064 tb_sw_warn(sw, "failed to de-allocate DP resource for port %d\n",
3065 in->port);
3066}
3067
3068struct tb_sw_lookup {
3069 struct tb *tb;
3070 u8 link;
3071 u8 depth;
3072 const uuid_t *uuid;
3073 u64 route;
3074};
3075
3076static int tb_switch_match(struct device *dev, const void *data)
3077{
3078 struct tb_switch *sw = tb_to_switch(dev);
3079 const struct tb_sw_lookup *lookup = data;
3080
3081 if (!sw)
3082 return 0;
3083 if (sw->tb != lookup->tb)
3084 return 0;
3085
3086 if (lookup->uuid)
3087 return !memcmp(sw->uuid, lookup->uuid, sizeof(*lookup->uuid));
3088
3089 if (lookup->route) {
3090 return sw->config.route_lo == lower_32_bits(lookup->route) &&
3091 sw->config.route_hi == upper_32_bits(lookup->route);
3092 }
3093
3094
3095 if (!lookup->depth)
3096 return !sw->depth;
3097
3098 return sw->link == lookup->link && sw->depth == lookup->depth;
3099}
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link, u8 depth)
3111{
3112 struct tb_sw_lookup lookup;
3113 struct device *dev;
3114
3115 memset(&lookup, 0, sizeof(lookup));
3116 lookup.tb = tb;
3117 lookup.link = link;
3118 lookup.depth = depth;
3119
3120 dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match);
3121 if (dev)
3122 return tb_to_switch(dev);
3123
3124 return NULL;
3125}
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid)
3136{
3137 struct tb_sw_lookup lookup;
3138 struct device *dev;
3139
3140 memset(&lookup, 0, sizeof(lookup));
3141 lookup.tb = tb;
3142 lookup.uuid = uuid;
3143
3144 dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match);
3145 if (dev)
3146 return tb_to_switch(dev);
3147
3148 return NULL;
3149}
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route)
3160{
3161 struct tb_sw_lookup lookup;
3162 struct device *dev;
3163
3164 if (!route)
3165 return tb_switch_get(tb->root_switch);
3166
3167 memset(&lookup, 0, sizeof(lookup));
3168 lookup.tb = tb;
3169 lookup.route = route;
3170
3171 dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match);
3172 if (dev)
3173 return tb_to_switch(dev);
3174
3175 return NULL;
3176}
3177
3178
3179
3180
3181
3182
3183struct tb_port *tb_switch_find_port(struct tb_switch *sw,
3184 enum tb_port_type type)
3185{
3186 struct tb_port *port;
3187
3188 tb_switch_for_each_port(sw, port) {
3189 if (port->config.type == type)
3190 return port;
3191 }
3192
3193 return NULL;
3194}
3195