1
2
3
4
5
6
7
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
29enum nvm_write_ops {
30 WRITE_AND_AUTHENTICATE = 1,
31 WRITE_ONLY = 2,
32};
33
34
35
36
37
38
39static LIST_HEAD(nvm_auth_status_cache);
40static DEFINE_MUTEX(nvm_auth_status_lock);
41
42static struct nvm_auth_status *__nvm_get_auth_status(const struct tb_switch *sw)
43{
44 struct nvm_auth_status *st;
45
46 list_for_each_entry(st, &nvm_auth_status_cache, list) {
47 if (uuid_equal(&st->uuid, sw->uuid))
48 return st;
49 }
50
51 return NULL;
52}
53
54static void nvm_get_auth_status(const struct tb_switch *sw, u32 *status)
55{
56 struct nvm_auth_status *st;
57
58 mutex_lock(&nvm_auth_status_lock);
59 st = __nvm_get_auth_status(sw);
60 mutex_unlock(&nvm_auth_status_lock);
61
62 *status = st ? st->status : 0;
63}
64
65static void nvm_set_auth_status(const struct tb_switch *sw, u32 status)
66{
67 struct nvm_auth_status *st;
68
69 if (WARN_ON(!sw->uuid))
70 return;
71
72 mutex_lock(&nvm_auth_status_lock);
73 st = __nvm_get_auth_status(sw);
74
75 if (!st) {
76 st = kzalloc(sizeof(*st), GFP_KERNEL);
77 if (!st)
78 goto unlock;
79
80 memcpy(&st->uuid, sw->uuid, sizeof(st->uuid));
81 INIT_LIST_HEAD(&st->list);
82 list_add_tail(&st->list, &nvm_auth_status_cache);
83 }
84
85 st->status = status;
86unlock:
87 mutex_unlock(&nvm_auth_status_lock);
88}
89
90static void nvm_clear_auth_status(const struct tb_switch *sw)
91{
92 struct nvm_auth_status *st;
93
94 mutex_lock(&nvm_auth_status_lock);
95 st = __nvm_get_auth_status(sw);
96 if (st) {
97 list_del(&st->list);
98 kfree(st);
99 }
100 mutex_unlock(&nvm_auth_status_lock);
101}
102
103static int nvm_validate_and_write(struct tb_switch *sw)
104{
105 unsigned int image_size, hdr_size;
106 const u8 *buf = sw->nvm->buf;
107 u16 ds_size;
108 int ret;
109
110 if (!buf)
111 return -EINVAL;
112
113 image_size = sw->nvm->buf_data_size;
114 if (image_size < NVM_MIN_SIZE || image_size > NVM_MAX_SIZE)
115 return -EINVAL;
116
117
118
119
120
121 hdr_size = (*(u32 *)buf) & 0xffffff;
122 if (hdr_size + NVM_DEVID + 2 >= image_size)
123 return -EINVAL;
124
125
126 if (!IS_ALIGNED(hdr_size, SZ_4K))
127 return -EINVAL;
128
129
130
131
132
133 ds_size = *(u16 *)(buf + hdr_size);
134 if (ds_size >= image_size)
135 return -EINVAL;
136
137 if (!sw->safe_mode) {
138 u16 device_id;
139
140
141
142
143
144 device_id = *(u16 *)(buf + hdr_size + NVM_DEVID);
145 if (device_id != sw->config.device_id)
146 return -EINVAL;
147
148 if (sw->generation < 3) {
149
150 ret = dma_port_flash_write(sw->dma_port,
151 DMA_PORT_CSS_ADDRESS, buf + NVM_CSS,
152 DMA_PORT_CSS_MAX_SIZE);
153 if (ret)
154 return ret;
155 }
156
157
158 buf += hdr_size;
159 image_size -= hdr_size;
160 }
161
162 if (tb_switch_is_usb4(sw))
163 ret = usb4_switch_nvm_write(sw, 0, buf, image_size);
164 else
165 ret = dma_port_flash_write(sw->dma_port, 0, buf, image_size);
166 if (!ret)
167 sw->nvm->flushed = true;
168 return ret;
169}
170
171static int nvm_authenticate_host_dma_port(struct tb_switch *sw)
172{
173 int ret = 0;
174
175
176
177
178
179
180 if (!sw->safe_mode) {
181 u32 status;
182
183 ret = tb_domain_disconnect_all_paths(sw->tb);
184 if (ret)
185 return ret;
186
187
188
189
190 ret = dma_port_flash_update_auth(sw->dma_port);
191 if (!ret || ret == -ETIMEDOUT)
192 return 0;
193
194
195
196
197
198 tb_sw_warn(sw, "failed to authenticate NVM, power cycling\n");
199 if (dma_port_flash_update_auth_status(sw->dma_port, &status) > 0)
200 nvm_set_auth_status(sw, status);
201 }
202
203
204
205
206
207 dma_port_power_cycle(sw->dma_port);
208 return ret;
209}
210
211static int nvm_authenticate_device_dma_port(struct tb_switch *sw)
212{
213 int ret, retries = 10;
214
215 ret = dma_port_flash_update_auth(sw->dma_port);
216 switch (ret) {
217 case 0:
218 case -ETIMEDOUT:
219 case -EACCES:
220 case -EINVAL:
221
222 break;
223 default:
224 return ret;
225 }
226
227
228
229
230
231
232
233 do {
234 u32 status;
235
236 ret = dma_port_flash_update_auth_status(sw->dma_port, &status);
237 if (ret < 0 && ret != -ETIMEDOUT)
238 return ret;
239 if (ret > 0) {
240 if (status) {
241 tb_sw_warn(sw, "failed to authenticate NVM\n");
242 nvm_set_auth_status(sw, status);
243 }
244
245 tb_sw_info(sw, "power cycling the switch now\n");
246 dma_port_power_cycle(sw->dma_port);
247 return 0;
248 }
249
250 msleep(500);
251 } while (--retries);
252
253 return -ETIMEDOUT;
254}
255
256static void nvm_authenticate_start_dma_port(struct tb_switch *sw)
257{
258 struct pci_dev *root_port;
259
260
261
262
263
264
265
266 root_port = pcie_find_root_port(sw->tb->nhi->pdev);
267 if (root_port)
268 pm_runtime_get_noresume(&root_port->dev);
269}
270
271static void nvm_authenticate_complete_dma_port(struct tb_switch *sw)
272{
273 struct pci_dev *root_port;
274
275 root_port = pcie_find_root_port(sw->tb->nhi->pdev);
276 if (root_port)
277 pm_runtime_put(&root_port->dev);
278}
279
280static inline bool nvm_readable(struct tb_switch *sw)
281{
282 if (tb_switch_is_usb4(sw)) {
283
284
285
286
287
288
289 return usb4_switch_nvm_sector_size(sw) > 0;
290 }
291
292
293 return !!sw->dma_port;
294}
295
296static inline bool nvm_upgradeable(struct tb_switch *sw)
297{
298 if (sw->no_nvm_upgrade)
299 return false;
300 return nvm_readable(sw);
301}
302
303static inline int nvm_read(struct tb_switch *sw, unsigned int address,
304 void *buf, size_t size)
305{
306 if (tb_switch_is_usb4(sw))
307 return usb4_switch_nvm_read(sw, address, buf, size);
308 return dma_port_flash_read(sw->dma_port, address, buf, size);
309}
310
311static int nvm_authenticate(struct tb_switch *sw)
312{
313 int ret;
314
315 if (tb_switch_is_usb4(sw))
316 return usb4_switch_nvm_authenticate(sw);
317
318 if (!tb_route(sw)) {
319 nvm_authenticate_start_dma_port(sw);
320 ret = nvm_authenticate_host_dma_port(sw);
321 } else {
322 ret = nvm_authenticate_device_dma_port(sw);
323 }
324
325 return ret;
326}
327
328static int tb_switch_nvm_read(void *priv, unsigned int offset, void *val,
329 size_t bytes)
330{
331 struct tb_nvm *nvm = priv;
332 struct tb_switch *sw = tb_to_switch(nvm->dev);
333 int ret;
334
335 pm_runtime_get_sync(&sw->dev);
336
337 if (!mutex_trylock(&sw->tb->lock)) {
338 ret = restart_syscall();
339 goto out;
340 }
341
342 ret = nvm_read(sw, offset, val, bytes);
343 mutex_unlock(&sw->tb->lock);
344
345out:
346 pm_runtime_mark_last_busy(&sw->dev);
347 pm_runtime_put_autosuspend(&sw->dev);
348
349 return ret;
350}
351
352static int tb_switch_nvm_write(void *priv, unsigned int offset, void *val,
353 size_t bytes)
354{
355 struct tb_nvm *nvm = priv;
356 struct tb_switch *sw = tb_to_switch(nvm->dev);
357 int ret;
358
359 if (!mutex_trylock(&sw->tb->lock))
360 return restart_syscall();
361
362
363
364
365
366
367
368 ret = tb_nvm_write_buf(nvm, offset, val, bytes);
369 mutex_unlock(&sw->tb->lock);
370
371 return ret;
372}
373
374static int tb_switch_nvm_add(struct tb_switch *sw)
375{
376 struct tb_nvm *nvm;
377 u32 val;
378 int ret;
379
380 if (!nvm_readable(sw))
381 return 0;
382
383
384
385
386
387
388 if (sw->config.vendor_id != PCI_VENDOR_ID_INTEL &&
389 sw->config.vendor_id != 0x8087) {
390 dev_info(&sw->dev,
391 "NVM format of vendor %#x is not known, disabling NVM upgrade\n",
392 sw->config.vendor_id);
393 return 0;
394 }
395
396 nvm = tb_nvm_alloc(&sw->dev);
397 if (IS_ERR(nvm))
398 return PTR_ERR(nvm);
399
400
401
402
403
404
405 if (!sw->safe_mode) {
406 u32 nvm_size, hdr_size;
407
408 ret = nvm_read(sw, NVM_FLASH_SIZE, &val, sizeof(val));
409 if (ret)
410 goto err_nvm;
411
412 hdr_size = sw->generation < 3 ? SZ_8K : SZ_16K;
413 nvm_size = (SZ_1M << (val & 7)) / 8;
414 nvm_size = (nvm_size - hdr_size) / 2;
415
416 ret = nvm_read(sw, NVM_VERSION, &val, sizeof(val));
417 if (ret)
418 goto err_nvm;
419
420 nvm->major = val >> 16;
421 nvm->minor = val >> 8;
422
423 ret = tb_nvm_add_active(nvm, nvm_size, tb_switch_nvm_read);
424 if (ret)
425 goto err_nvm;
426 }
427
428 if (!sw->no_nvm_upgrade) {
429 ret = tb_nvm_add_non_active(nvm, NVM_MAX_SIZE,
430 tb_switch_nvm_write);
431 if (ret)
432 goto err_nvm;
433 }
434
435 sw->nvm = nvm;
436 return 0;
437
438err_nvm:
439 tb_nvm_free(nvm);
440 return ret;
441}
442
443static void tb_switch_nvm_remove(struct tb_switch *sw)
444{
445 struct tb_nvm *nvm;
446
447 nvm = sw->nvm;
448 sw->nvm = NULL;
449
450 if (!nvm)
451 return;
452
453
454 if (!nvm->authenticating)
455 nvm_clear_auth_status(sw);
456
457 tb_nvm_free(nvm);
458}
459
460
461
462static const char *tb_port_type(struct tb_regs_port_header *port)
463{
464 switch (port->type >> 16) {
465 case 0:
466 switch ((u8) port->type) {
467 case 0:
468 return "Inactive";
469 case 1:
470 return "Port";
471 case 2:
472 return "NHI";
473 default:
474 return "unknown";
475 }
476 case 0x2:
477 return "Ethernet";
478 case 0x8:
479 return "SATA";
480 case 0xe:
481 return "DP/HDMI";
482 case 0x10:
483 return "PCIe";
484 case 0x20:
485 return "USB";
486 default:
487 return "unknown";
488 }
489}
490
491static void tb_dump_port(struct tb *tb, struct tb_regs_port_header *port)
492{
493 tb_dbg(tb,
494 " Port %d: %x:%x (Revision: %d, TB Version: %d, Type: %s (%#x))\n",
495 port->port_number, port->vendor_id, port->device_id,
496 port->revision, port->thunderbolt_version, tb_port_type(port),
497 port->type);
498 tb_dbg(tb, " Max hop id (in/out): %d/%d\n",
499 port->max_in_hop_id, port->max_out_hop_id);
500 tb_dbg(tb, " Max counters: %d\n", port->max_counters);
501 tb_dbg(tb, " NFC Credits: %#x\n", port->nfc_credits);
502}
503
504
505
506
507
508
509
510
511static int tb_port_state(struct tb_port *port)
512{
513 struct tb_cap_phy phy;
514 int res;
515 if (port->cap_phy == 0) {
516 tb_port_WARN(port, "does not have a PHY\n");
517 return -EINVAL;
518 }
519 res = tb_port_read(port, &phy, TB_CFG_PORT, port->cap_phy, 2);
520 if (res)
521 return res;
522 return phy.state;
523}
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged)
539{
540 int retries = 10;
541 int state;
542 if (!port->cap_phy) {
543 tb_port_WARN(port, "does not have PHY\n");
544 return -EINVAL;
545 }
546 if (tb_is_upstream_port(port)) {
547 tb_port_WARN(port, "is the upstream port\n");
548 return -EINVAL;
549 }
550
551 while (retries--) {
552 state = tb_port_state(port);
553 if (state < 0)
554 return state;
555 if (state == TB_PORT_DISABLED) {
556 tb_port_dbg(port, "is disabled (state: 0)\n");
557 return 0;
558 }
559 if (state == TB_PORT_UNPLUGGED) {
560 if (wait_if_unplugged) {
561
562 tb_port_dbg(port,
563 "is unplugged (state: 7), retrying...\n");
564 msleep(100);
565 continue;
566 }
567 tb_port_dbg(port, "is unplugged (state: 7)\n");
568 return 0;
569 }
570 if (state == TB_PORT_UP) {
571 tb_port_dbg(port, "is connected, link is up (state: 2)\n");
572 return 1;
573 }
574
575
576
577
578
579 tb_port_dbg(port,
580 "is connected, link is not up (state: %d), retrying...\n",
581 state);
582 msleep(100);
583 }
584 tb_port_warn(port,
585 "failed to reach state TB_PORT_UP. Ignoring port...\n");
586 return 0;
587}
588
589
590
591
592
593
594
595
596
597int tb_port_add_nfc_credits(struct tb_port *port, int credits)
598{
599 u32 nfc_credits;
600
601 if (credits == 0 || port->sw->is_unplugged)
602 return 0;
603
604
605
606
607
608 if (tb_switch_is_usb4(port->sw) && !tb_port_is_null(port))
609 return 0;
610
611 nfc_credits = port->config.nfc_credits & ADP_CS_4_NFC_BUFFERS_MASK;
612 nfc_credits += credits;
613
614 tb_port_dbg(port, "adding %d NFC credits to %lu", credits,
615 port->config.nfc_credits & ADP_CS_4_NFC_BUFFERS_MASK);
616
617 port->config.nfc_credits &= ~ADP_CS_4_NFC_BUFFERS_MASK;
618 port->config.nfc_credits |= nfc_credits;
619
620 return tb_port_write(port, &port->config.nfc_credits,
621 TB_CFG_PORT, ADP_CS_4, 1);
622}
623
624
625
626
627
628
629
630
631int tb_port_set_initial_credits(struct tb_port *port, u32 credits)
632{
633 u32 data;
634 int ret;
635
636 ret = tb_port_read(port, &data, TB_CFG_PORT, ADP_CS_5, 1);
637 if (ret)
638 return ret;
639
640 data &= ~ADP_CS_5_LCA_MASK;
641 data |= (credits << ADP_CS_5_LCA_SHIFT) & ADP_CS_5_LCA_MASK;
642
643 return tb_port_write(port, &data, TB_CFG_PORT, ADP_CS_5, 1);
644}
645
646
647
648
649
650
651int tb_port_clear_counter(struct tb_port *port, int counter)
652{
653 u32 zero[3] = { 0, 0, 0 };
654 tb_port_dbg(port, "clearing counter %d\n", counter);
655 return tb_port_write(port, zero, TB_CFG_COUNTERS, 3 * counter, 3);
656}
657
658
659
660
661
662
663
664
665int tb_port_unlock(struct tb_port *port)
666{
667 if (tb_switch_is_icm(port->sw))
668 return 0;
669 if (!tb_port_is_null(port))
670 return -EINVAL;
671 if (tb_switch_is_usb4(port->sw))
672 return usb4_port_unlock(port);
673 return 0;
674}
675
676static int __tb_port_enable(struct tb_port *port, bool enable)
677{
678 int ret;
679 u32 phy;
680
681 if (!tb_port_is_null(port))
682 return -EINVAL;
683
684 ret = tb_port_read(port, &phy, TB_CFG_PORT,
685 port->cap_phy + LANE_ADP_CS_1, 1);
686 if (ret)
687 return ret;
688
689 if (enable)
690 phy &= ~LANE_ADP_CS_1_LD;
691 else
692 phy |= LANE_ADP_CS_1_LD;
693
694 return tb_port_write(port, &phy, TB_CFG_PORT,
695 port->cap_phy + LANE_ADP_CS_1, 1);
696}
697
698
699
700
701
702
703
704int tb_port_enable(struct tb_port *port)
705{
706 return __tb_port_enable(port, true);
707}
708
709
710
711
712
713
714
715int tb_port_disable(struct tb_port *port)
716{
717 return __tb_port_enable(port, false);
718}
719
720
721
722
723
724
725
726
727
728static int tb_init_port(struct tb_port *port)
729{
730 int res;
731 int cap;
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 && port->port != 0) {
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 } else if (port->port != 0) {
757 cap = tb_port_find_cap(port, TB_PORT_CAP_ADAP);
758 if (cap > 0)
759 port->cap_adap = cap;
760 }
761
762 tb_dump_port(port->sw->tb, &port->config);
763
764
765 if (port->port) {
766 ida_init(&port->in_hopids);
767 ida_init(&port->out_hopids);
768 }
769
770 INIT_LIST_HEAD(&port->list);
771 return 0;
772
773}
774
775static int tb_port_alloc_hopid(struct tb_port *port, bool in, int min_hopid,
776 int max_hopid)
777{
778 int port_max_hopid;
779 struct ida *ida;
780
781 if (in) {
782 port_max_hopid = port->config.max_in_hop_id;
783 ida = &port->in_hopids;
784 } else {
785 port_max_hopid = port->config.max_out_hop_id;
786 ida = &port->out_hopids;
787 }
788
789
790
791
792
793 if (!tb_port_is_nhi(port) && min_hopid < TB_PATH_MIN_HOPID)
794 min_hopid = TB_PATH_MIN_HOPID;
795
796 if (max_hopid < 0 || max_hopid > port_max_hopid)
797 max_hopid = port_max_hopid;
798
799 return ida_simple_get(ida, min_hopid, max_hopid + 1, GFP_KERNEL);
800}
801
802
803
804
805
806
807
808
809
810
811int tb_port_alloc_in_hopid(struct tb_port *port, int min_hopid, int max_hopid)
812{
813 return tb_port_alloc_hopid(port, true, min_hopid, max_hopid);
814}
815
816
817
818
819
820
821
822
823
824
825int tb_port_alloc_out_hopid(struct tb_port *port, int min_hopid, int max_hopid)
826{
827 return tb_port_alloc_hopid(port, false, min_hopid, max_hopid);
828}
829
830
831
832
833
834
835void tb_port_release_in_hopid(struct tb_port *port, int hopid)
836{
837 ida_simple_remove(&port->in_hopids, hopid);
838}
839
840
841
842
843
844
845void tb_port_release_out_hopid(struct tb_port *port, int hopid)
846{
847 ida_simple_remove(&port->out_hopids, hopid);
848}
849
850static inline bool tb_switch_is_reachable(const struct tb_switch *parent,
851 const struct tb_switch *sw)
852{
853 u64 mask = (1ULL << parent->config.depth * 8) - 1;
854 return (tb_route(parent) & mask) == (tb_route(sw) & mask);
855}
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
873 struct tb_port *prev)
874{
875 struct tb_port *next;
876
877 if (!prev)
878 return start;
879
880 if (prev->sw == end->sw) {
881 if (prev == end)
882 return NULL;
883 return end;
884 }
885
886 if (tb_switch_is_reachable(prev->sw, end->sw)) {
887 next = tb_port_at(tb_route(end->sw), prev->sw);
888
889 if (prev->remote &&
890 (next == prev || next->dual_link_port == prev))
891 next = prev->remote;
892 } else {
893 if (tb_is_upstream_port(prev)) {
894 next = prev->remote;
895 } else {
896 next = tb_upstream_port(prev->sw);
897
898
899
900
901 if (next->dual_link_port &&
902 next->link_nr != prev->link_nr) {
903 next = next->dual_link_port;
904 }
905 }
906 }
907
908 return next != prev ? next : NULL;
909}
910
911
912
913
914
915
916
917int tb_port_get_link_speed(struct tb_port *port)
918{
919 u32 val, speed;
920 int ret;
921
922 if (!port->cap_phy)
923 return -EINVAL;
924
925 ret = tb_port_read(port, &val, TB_CFG_PORT,
926 port->cap_phy + LANE_ADP_CS_1, 1);
927 if (ret)
928 return ret;
929
930 speed = (val & LANE_ADP_CS_1_CURRENT_SPEED_MASK) >>
931 LANE_ADP_CS_1_CURRENT_SPEED_SHIFT;
932 return speed == LANE_ADP_CS_1_CURRENT_SPEED_GEN3 ? 20 : 10;
933}
934
935static int tb_port_get_link_width(struct tb_port *port)
936{
937 u32 val;
938 int ret;
939
940 if (!port->cap_phy)
941 return -EINVAL;
942
943 ret = tb_port_read(port, &val, TB_CFG_PORT,
944 port->cap_phy + LANE_ADP_CS_1, 1);
945 if (ret)
946 return ret;
947
948 return (val & LANE_ADP_CS_1_CURRENT_WIDTH_MASK) >>
949 LANE_ADP_CS_1_CURRENT_WIDTH_SHIFT;
950}
951
952static bool tb_port_is_width_supported(struct tb_port *port, int width)
953{
954 u32 phy, widths;
955 int ret;
956
957 if (!port->cap_phy)
958 return false;
959
960 ret = tb_port_read(port, &phy, TB_CFG_PORT,
961 port->cap_phy + LANE_ADP_CS_0, 1);
962 if (ret)
963 return false;
964
965 widths = (phy & LANE_ADP_CS_0_SUPPORTED_WIDTH_MASK) >>
966 LANE_ADP_CS_0_SUPPORTED_WIDTH_SHIFT;
967
968 return !!(widths & width);
969}
970
971static int tb_port_set_link_width(struct tb_port *port, unsigned int width)
972{
973 u32 val;
974 int ret;
975
976 if (!port->cap_phy)
977 return -EINVAL;
978
979 ret = tb_port_read(port, &val, TB_CFG_PORT,
980 port->cap_phy + LANE_ADP_CS_1, 1);
981 if (ret)
982 return ret;
983
984 val &= ~LANE_ADP_CS_1_TARGET_WIDTH_MASK;
985 switch (width) {
986 case 1:
987 val |= LANE_ADP_CS_1_TARGET_WIDTH_SINGLE <<
988 LANE_ADP_CS_1_TARGET_WIDTH_SHIFT;
989 break;
990 case 2:
991 val |= LANE_ADP_CS_1_TARGET_WIDTH_DUAL <<
992 LANE_ADP_CS_1_TARGET_WIDTH_SHIFT;
993 break;
994 default:
995 return -EINVAL;
996 }
997
998 val |= LANE_ADP_CS_1_LB;
999
1000 return tb_port_write(port, &val, TB_CFG_PORT,
1001 port->cap_phy + LANE_ADP_CS_1, 1);
1002}
1003
1004static int tb_port_lane_bonding_enable(struct tb_port *port)
1005{
1006 int ret;
1007
1008
1009
1010
1011
1012 ret = tb_port_get_link_width(port);
1013 if (ret == 1) {
1014 ret = tb_port_set_link_width(port, 2);
1015 if (ret)
1016 return ret;
1017 }
1018
1019 ret = tb_port_get_link_width(port->dual_link_port);
1020 if (ret == 1) {
1021 ret = tb_port_set_link_width(port->dual_link_port, 2);
1022 if (ret) {
1023 tb_port_set_link_width(port, 1);
1024 return ret;
1025 }
1026 }
1027
1028 port->bonded = true;
1029 port->dual_link_port->bonded = true;
1030
1031 return 0;
1032}
1033
1034static void tb_port_lane_bonding_disable(struct tb_port *port)
1035{
1036 port->dual_link_port->bonded = false;
1037 port->bonded = false;
1038
1039 tb_port_set_link_width(port->dual_link_port, 1);
1040 tb_port_set_link_width(port, 1);
1041}
1042
1043
1044
1045
1046
1047bool tb_port_is_enabled(struct tb_port *port)
1048{
1049 switch (port->config.type) {
1050 case TB_TYPE_PCIE_UP:
1051 case TB_TYPE_PCIE_DOWN:
1052 return tb_pci_port_is_enabled(port);
1053
1054 case TB_TYPE_DP_HDMI_IN:
1055 case TB_TYPE_DP_HDMI_OUT:
1056 return tb_dp_port_is_enabled(port);
1057
1058 case TB_TYPE_USB3_UP:
1059 case TB_TYPE_USB3_DOWN:
1060 return tb_usb3_port_is_enabled(port);
1061
1062 default:
1063 return false;
1064 }
1065}
1066
1067
1068
1069
1070
1071bool tb_usb3_port_is_enabled(struct tb_port *port)
1072{
1073 u32 data;
1074
1075 if (tb_port_read(port, &data, TB_CFG_PORT,
1076 port->cap_adap + ADP_USB3_CS_0, 1))
1077 return false;
1078
1079 return !!(data & ADP_USB3_CS_0_PE);
1080}
1081
1082
1083
1084
1085
1086
1087int tb_usb3_port_enable(struct tb_port *port, bool enable)
1088{
1089 u32 word = enable ? (ADP_USB3_CS_0_PE | ADP_USB3_CS_0_V)
1090 : ADP_USB3_CS_0_V;
1091
1092 if (!port->cap_adap)
1093 return -ENXIO;
1094 return tb_port_write(port, &word, TB_CFG_PORT,
1095 port->cap_adap + ADP_USB3_CS_0, 1);
1096}
1097
1098
1099
1100
1101
1102bool tb_pci_port_is_enabled(struct tb_port *port)
1103{
1104 u32 data;
1105
1106 if (tb_port_read(port, &data, TB_CFG_PORT,
1107 port->cap_adap + ADP_PCIE_CS_0, 1))
1108 return false;
1109
1110 return !!(data & ADP_PCIE_CS_0_PE);
1111}
1112
1113
1114
1115
1116
1117
1118int tb_pci_port_enable(struct tb_port *port, bool enable)
1119{
1120 u32 word = enable ? ADP_PCIE_CS_0_PE : 0x0;
1121 if (!port->cap_adap)
1122 return -ENXIO;
1123 return tb_port_write(port, &word, TB_CFG_PORT,
1124 port->cap_adap + ADP_PCIE_CS_0, 1);
1125}
1126
1127
1128
1129
1130
1131
1132
1133int tb_dp_port_hpd_is_active(struct tb_port *port)
1134{
1135 u32 data;
1136 int ret;
1137
1138 ret = tb_port_read(port, &data, TB_CFG_PORT,
1139 port->cap_adap + ADP_DP_CS_2, 1);
1140 if (ret)
1141 return ret;
1142
1143 return !!(data & ADP_DP_CS_2_HDP);
1144}
1145
1146
1147
1148
1149
1150
1151
1152int tb_dp_port_hpd_clear(struct tb_port *port)
1153{
1154 u32 data;
1155 int ret;
1156
1157 ret = tb_port_read(port, &data, TB_CFG_PORT,
1158 port->cap_adap + ADP_DP_CS_3, 1);
1159 if (ret)
1160 return ret;
1161
1162 data |= ADP_DP_CS_3_HDPC;
1163 return tb_port_write(port, &data, TB_CFG_PORT,
1164 port->cap_adap + ADP_DP_CS_3, 1);
1165}
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176int tb_dp_port_set_hops(struct tb_port *port, unsigned int video,
1177 unsigned int aux_tx, unsigned int aux_rx)
1178{
1179 u32 data[2];
1180 int ret;
1181
1182 ret = tb_port_read(port, data, TB_CFG_PORT,
1183 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1184 if (ret)
1185 return ret;
1186
1187 data[0] &= ~ADP_DP_CS_0_VIDEO_HOPID_MASK;
1188 data[1] &= ~ADP_DP_CS_1_AUX_RX_HOPID_MASK;
1189 data[1] &= ~ADP_DP_CS_1_AUX_RX_HOPID_MASK;
1190
1191 data[0] |= (video << ADP_DP_CS_0_VIDEO_HOPID_SHIFT) &
1192 ADP_DP_CS_0_VIDEO_HOPID_MASK;
1193 data[1] |= aux_tx & ADP_DP_CS_1_AUX_TX_HOPID_MASK;
1194 data[1] |= (aux_rx << ADP_DP_CS_1_AUX_RX_HOPID_SHIFT) &
1195 ADP_DP_CS_1_AUX_RX_HOPID_MASK;
1196
1197 return tb_port_write(port, data, TB_CFG_PORT,
1198 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1199}
1200
1201
1202
1203
1204
1205bool tb_dp_port_is_enabled(struct tb_port *port)
1206{
1207 u32 data[2];
1208
1209 if (tb_port_read(port, data, TB_CFG_PORT, port->cap_adap + ADP_DP_CS_0,
1210 ARRAY_SIZE(data)))
1211 return false;
1212
1213 return !!(data[0] & (ADP_DP_CS_0_VE | ADP_DP_CS_0_AE));
1214}
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224int tb_dp_port_enable(struct tb_port *port, bool enable)
1225{
1226 u32 data[2];
1227 int ret;
1228
1229 ret = tb_port_read(port, data, TB_CFG_PORT,
1230 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1231 if (ret)
1232 return ret;
1233
1234 if (enable)
1235 data[0] |= ADP_DP_CS_0_VE | ADP_DP_CS_0_AE;
1236 else
1237 data[0] &= ~(ADP_DP_CS_0_VE | ADP_DP_CS_0_AE);
1238
1239 return tb_port_write(port, data, TB_CFG_PORT,
1240 port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
1241}
1242
1243
1244
1245static const char *tb_switch_generation_name(const struct tb_switch *sw)
1246{
1247 switch (sw->generation) {
1248 case 1:
1249 return "Thunderbolt 1";
1250 case 2:
1251 return "Thunderbolt 2";
1252 case 3:
1253 return "Thunderbolt 3";
1254 case 4:
1255 return "USB4";
1256 default:
1257 return "Unknown";
1258 }
1259}
1260
1261static void tb_dump_switch(const struct tb *tb, const struct tb_switch *sw)
1262{
1263 const struct tb_regs_switch_header *regs = &sw->config;
1264
1265 tb_dbg(tb, " %s Switch: %x:%x (Revision: %d, TB Version: %d)\n",
1266 tb_switch_generation_name(sw), regs->vendor_id, regs->device_id,
1267 regs->revision, regs->thunderbolt_version);
1268 tb_dbg(tb, " Max Port Number: %d\n", regs->max_port_number);
1269 tb_dbg(tb, " Config:\n");
1270 tb_dbg(tb,
1271 " Upstream Port Number: %d Depth: %d Route String: %#llx Enabled: %d, PlugEventsDelay: %dms\n",
1272 regs->upstream_port_number, regs->depth,
1273 (((u64) regs->route_hi) << 32) | regs->route_lo,
1274 regs->enabled, regs->plug_events_delay);
1275 tb_dbg(tb, " unknown1: %#x unknown4: %#x\n",
1276 regs->__unknown1, regs->__unknown4);
1277}
1278
1279
1280
1281
1282
1283
1284
1285int tb_switch_reset(struct tb_switch *sw)
1286{
1287 struct tb_cfg_result res;
1288
1289 if (sw->generation > 1)
1290 return 0;
1291
1292 tb_sw_dbg(sw, "resetting switch\n");
1293
1294 res.err = tb_sw_write(sw, ((u32 *) &sw->config) + 2,
1295 TB_CFG_SWITCH, 2, 2);
1296 if (res.err)
1297 return res.err;
1298 res = tb_cfg_reset(sw->tb->ctl, tb_route(sw), TB_CFG_DEFAULT_TIMEOUT);
1299 if (res.err > 0)
1300 return -EIO;
1301 return res.err;
1302}
1303
1304
1305
1306
1307
1308
1309
1310
1311static int tb_plug_events_active(struct tb_switch *sw, bool active)
1312{
1313 u32 data;
1314 int res;
1315
1316 if (tb_switch_is_icm(sw) || tb_switch_is_usb4(sw))
1317 return 0;
1318
1319 sw->config.plug_events_delay = 0xff;
1320 res = tb_sw_write(sw, ((u32 *) &sw->config) + 4, TB_CFG_SWITCH, 4, 1);
1321 if (res)
1322 return res;
1323
1324 res = tb_sw_read(sw, &data, TB_CFG_SWITCH, sw->cap_plug_events + 1, 1);
1325 if (res)
1326 return res;
1327
1328 if (active) {
1329 data = data & 0xFFFFFF83;
1330 switch (sw->config.device_id) {
1331 case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE:
1332 case PCI_DEVICE_ID_INTEL_EAGLE_RIDGE:
1333 case PCI_DEVICE_ID_INTEL_PORT_RIDGE:
1334 break;
1335 default:
1336 data |= 4;
1337 }
1338 } else {
1339 data = data | 0x7c;
1340 }
1341 return tb_sw_write(sw, &data, TB_CFG_SWITCH,
1342 sw->cap_plug_events + 1, 1);
1343}
1344
1345static ssize_t authorized_show(struct device *dev,
1346 struct device_attribute *attr,
1347 char *buf)
1348{
1349 struct tb_switch *sw = tb_to_switch(dev);
1350
1351 return sprintf(buf, "%u\n", sw->authorized);
1352}
1353
1354static int tb_switch_set_authorized(struct tb_switch *sw, unsigned int val)
1355{
1356 int ret = -EINVAL;
1357
1358 if (!mutex_trylock(&sw->tb->lock))
1359 return restart_syscall();
1360
1361 if (sw->authorized)
1362 goto unlock;
1363
1364 switch (val) {
1365
1366 case 1:
1367 if (sw->key)
1368 ret = tb_domain_approve_switch_key(sw->tb, sw);
1369 else
1370 ret = tb_domain_approve_switch(sw->tb, sw);
1371 break;
1372
1373
1374 case 2:
1375 if (sw->key)
1376 ret = tb_domain_challenge_switch_key(sw->tb, sw);
1377 break;
1378
1379 default:
1380 break;
1381 }
1382
1383 if (!ret) {
1384 sw->authorized = val;
1385
1386 kobject_uevent(&sw->dev.kobj, KOBJ_CHANGE);
1387 }
1388
1389unlock:
1390 mutex_unlock(&sw->tb->lock);
1391 return ret;
1392}
1393
1394static ssize_t authorized_store(struct device *dev,
1395 struct device_attribute *attr,
1396 const char *buf, size_t count)
1397{
1398 struct tb_switch *sw = tb_to_switch(dev);
1399 unsigned int val;
1400 ssize_t ret;
1401
1402 ret = kstrtouint(buf, 0, &val);
1403 if (ret)
1404 return ret;
1405 if (val > 2)
1406 return -EINVAL;
1407
1408 pm_runtime_get_sync(&sw->dev);
1409 ret = tb_switch_set_authorized(sw, val);
1410 pm_runtime_mark_last_busy(&sw->dev);
1411 pm_runtime_put_autosuspend(&sw->dev);
1412
1413 return ret ? ret : count;
1414}
1415static DEVICE_ATTR_RW(authorized);
1416
1417static ssize_t boot_show(struct device *dev, struct device_attribute *attr,
1418 char *buf)
1419{
1420 struct tb_switch *sw = tb_to_switch(dev);
1421
1422 return sprintf(buf, "%u\n", sw->boot);
1423}
1424static DEVICE_ATTR_RO(boot);
1425
1426static ssize_t device_show(struct device *dev, struct device_attribute *attr,
1427 char *buf)
1428{
1429 struct tb_switch *sw = tb_to_switch(dev);
1430
1431 return sprintf(buf, "%#x\n", sw->device);
1432}
1433static DEVICE_ATTR_RO(device);
1434
1435static ssize_t
1436device_name_show(struct device *dev, struct device_attribute *attr, char *buf)
1437{
1438 struct tb_switch *sw = tb_to_switch(dev);
1439
1440 return sprintf(buf, "%s\n", sw->device_name ? sw->device_name : "");
1441}
1442static DEVICE_ATTR_RO(device_name);
1443
1444static ssize_t
1445generation_show(struct device *dev, struct device_attribute *attr, char *buf)
1446{
1447 struct tb_switch *sw = tb_to_switch(dev);
1448
1449 return sprintf(buf, "%u\n", sw->generation);
1450}
1451static DEVICE_ATTR_RO(generation);
1452
1453static ssize_t key_show(struct device *dev, struct device_attribute *attr,
1454 char *buf)
1455{
1456 struct tb_switch *sw = tb_to_switch(dev);
1457 ssize_t ret;
1458
1459 if (!mutex_trylock(&sw->tb->lock))
1460 return restart_syscall();
1461
1462 if (sw->key)
1463 ret = sprintf(buf, "%*phN\n", TB_SWITCH_KEY_SIZE, sw->key);
1464 else
1465 ret = sprintf(buf, "\n");
1466
1467 mutex_unlock(&sw->tb->lock);
1468 return ret;
1469}
1470
1471static ssize_t key_store(struct device *dev, struct device_attribute *attr,
1472 const char *buf, size_t count)
1473{
1474 struct tb_switch *sw = tb_to_switch(dev);
1475 u8 key[TB_SWITCH_KEY_SIZE];
1476 ssize_t ret = count;
1477 bool clear = false;
1478
1479 if (!strcmp(buf, "\n"))
1480 clear = true;
1481 else if (hex2bin(key, buf, sizeof(key)))
1482 return -EINVAL;
1483
1484 if (!mutex_trylock(&sw->tb->lock))
1485 return restart_syscall();
1486
1487 if (sw->authorized) {
1488 ret = -EBUSY;
1489 } else {
1490 kfree(sw->key);
1491 if (clear) {
1492 sw->key = NULL;
1493 } else {
1494 sw->key = kmemdup(key, sizeof(key), GFP_KERNEL);
1495 if (!sw->key)
1496 ret = -ENOMEM;
1497 }
1498 }
1499
1500 mutex_unlock(&sw->tb->lock);
1501 return ret;
1502}
1503static DEVICE_ATTR(key, 0600, key_show, key_store);
1504
1505static ssize_t speed_show(struct device *dev, struct device_attribute *attr,
1506 char *buf)
1507{
1508 struct tb_switch *sw = tb_to_switch(dev);
1509
1510 return sprintf(buf, "%u.0 Gb/s\n", sw->link_speed);
1511}
1512
1513
1514
1515
1516
1517static DEVICE_ATTR(rx_speed, 0444, speed_show, NULL);
1518static DEVICE_ATTR(tx_speed, 0444, speed_show, NULL);
1519
1520static ssize_t lanes_show(struct device *dev, struct device_attribute *attr,
1521 char *buf)
1522{
1523 struct tb_switch *sw = tb_to_switch(dev);
1524
1525 return sprintf(buf, "%u\n", sw->link_width);
1526}
1527
1528
1529
1530
1531
1532static DEVICE_ATTR(rx_lanes, 0444, lanes_show, NULL);
1533static DEVICE_ATTR(tx_lanes, 0444, lanes_show, NULL);
1534
1535static ssize_t nvm_authenticate_show(struct device *dev,
1536 struct device_attribute *attr, char *buf)
1537{
1538 struct tb_switch *sw = tb_to_switch(dev);
1539 u32 status;
1540
1541 nvm_get_auth_status(sw, &status);
1542 return sprintf(buf, "%#x\n", status);
1543}
1544
1545static ssize_t nvm_authenticate_sysfs(struct device *dev, const char *buf,
1546 bool disconnect)
1547{
1548 struct tb_switch *sw = tb_to_switch(dev);
1549 int val;
1550 int ret;
1551
1552 pm_runtime_get_sync(&sw->dev);
1553
1554 if (!mutex_trylock(&sw->tb->lock)) {
1555 ret = restart_syscall();
1556 goto exit_rpm;
1557 }
1558
1559
1560 if (!sw->nvm) {
1561 ret = -EAGAIN;
1562 goto exit_unlock;
1563 }
1564
1565 ret = kstrtoint(buf, 10, &val);
1566 if (ret)
1567 goto exit_unlock;
1568
1569
1570 nvm_clear_auth_status(sw);
1571
1572 if (val > 0) {
1573 if (!sw->nvm->flushed) {
1574 if (!sw->nvm->buf) {
1575 ret = -EINVAL;
1576 goto exit_unlock;
1577 }
1578
1579 ret = nvm_validate_and_write(sw);
1580 if (ret || val == WRITE_ONLY)
1581 goto exit_unlock;
1582 }
1583 if (val == WRITE_AND_AUTHENTICATE) {
1584 if (disconnect) {
1585 ret = tb_lc_force_power(sw);
1586 } else {
1587 sw->nvm->authenticating = true;
1588 ret = nvm_authenticate(sw);
1589 }
1590 }
1591 }
1592
1593exit_unlock:
1594 mutex_unlock(&sw->tb->lock);
1595exit_rpm:
1596 pm_runtime_mark_last_busy(&sw->dev);
1597 pm_runtime_put_autosuspend(&sw->dev);
1598
1599 return ret;
1600}
1601
1602static ssize_t nvm_authenticate_store(struct device *dev,
1603 struct device_attribute *attr, const char *buf, size_t count)
1604{
1605 int ret = nvm_authenticate_sysfs(dev, buf, false);
1606 if (ret)
1607 return ret;
1608 return count;
1609}
1610static DEVICE_ATTR_RW(nvm_authenticate);
1611
1612static ssize_t nvm_authenticate_on_disconnect_show(struct device *dev,
1613 struct device_attribute *attr, char *buf)
1614{
1615 return nvm_authenticate_show(dev, attr, buf);
1616}
1617
1618static ssize_t nvm_authenticate_on_disconnect_store(struct device *dev,
1619 struct device_attribute *attr, const char *buf, size_t count)
1620{
1621 int ret;
1622
1623 ret = nvm_authenticate_sysfs(dev, buf, true);
1624 return ret ? ret : count;
1625}
1626static DEVICE_ATTR_RW(nvm_authenticate_on_disconnect);
1627
1628static ssize_t nvm_version_show(struct device *dev,
1629 struct device_attribute *attr, char *buf)
1630{
1631 struct tb_switch *sw = tb_to_switch(dev);
1632 int ret;
1633
1634 if (!mutex_trylock(&sw->tb->lock))
1635 return restart_syscall();
1636
1637 if (sw->safe_mode)
1638 ret = -ENODATA;
1639 else if (!sw->nvm)
1640 ret = -EAGAIN;
1641 else
1642 ret = sprintf(buf, "%x.%x\n", sw->nvm->major, sw->nvm->minor);
1643
1644 mutex_unlock(&sw->tb->lock);
1645
1646 return ret;
1647}
1648static DEVICE_ATTR_RO(nvm_version);
1649
1650static ssize_t vendor_show(struct device *dev, struct device_attribute *attr,
1651 char *buf)
1652{
1653 struct tb_switch *sw = tb_to_switch(dev);
1654
1655 return sprintf(buf, "%#x\n", sw->vendor);
1656}
1657static DEVICE_ATTR_RO(vendor);
1658
1659static ssize_t
1660vendor_name_show(struct device *dev, struct device_attribute *attr, char *buf)
1661{
1662 struct tb_switch *sw = tb_to_switch(dev);
1663
1664 return sprintf(buf, "%s\n", sw->vendor_name ? sw->vendor_name : "");
1665}
1666static DEVICE_ATTR_RO(vendor_name);
1667
1668static ssize_t unique_id_show(struct device *dev, struct device_attribute *attr,
1669 char *buf)
1670{
1671 struct tb_switch *sw = tb_to_switch(dev);
1672
1673 return sprintf(buf, "%pUb\n", sw->uuid);
1674}
1675static DEVICE_ATTR_RO(unique_id);
1676
1677static struct attribute *switch_attrs[] = {
1678 &dev_attr_authorized.attr,
1679 &dev_attr_boot.attr,
1680 &dev_attr_device.attr,
1681 &dev_attr_device_name.attr,
1682 &dev_attr_generation.attr,
1683 &dev_attr_key.attr,
1684 &dev_attr_nvm_authenticate.attr,
1685 &dev_attr_nvm_authenticate_on_disconnect.attr,
1686 &dev_attr_nvm_version.attr,
1687 &dev_attr_rx_speed.attr,
1688 &dev_attr_rx_lanes.attr,
1689 &dev_attr_tx_speed.attr,
1690 &dev_attr_tx_lanes.attr,
1691 &dev_attr_vendor.attr,
1692 &dev_attr_vendor_name.attr,
1693 &dev_attr_unique_id.attr,
1694 NULL,
1695};
1696
1697static umode_t switch_attr_is_visible(struct kobject *kobj,
1698 struct attribute *attr, int n)
1699{
1700 struct device *dev = kobj_to_dev(kobj);
1701 struct tb_switch *sw = tb_to_switch(dev);
1702
1703 if (attr == &dev_attr_device.attr) {
1704 if (!sw->device)
1705 return 0;
1706 } else if (attr == &dev_attr_device_name.attr) {
1707 if (!sw->device_name)
1708 return 0;
1709 } else if (attr == &dev_attr_vendor.attr) {
1710 if (!sw->vendor)
1711 return 0;
1712 } else if (attr == &dev_attr_vendor_name.attr) {
1713 if (!sw->vendor_name)
1714 return 0;
1715 } else if (attr == &dev_attr_key.attr) {
1716 if (tb_route(sw) &&
1717 sw->tb->security_level == TB_SECURITY_SECURE &&
1718 sw->security_level == TB_SECURITY_SECURE)
1719 return attr->mode;
1720 return 0;
1721 } else if (attr == &dev_attr_rx_speed.attr ||
1722 attr == &dev_attr_rx_lanes.attr ||
1723 attr == &dev_attr_tx_speed.attr ||
1724 attr == &dev_attr_tx_lanes.attr) {
1725 if (tb_route(sw))
1726 return attr->mode;
1727 return 0;
1728 } else if (attr == &dev_attr_nvm_authenticate.attr) {
1729 if (nvm_upgradeable(sw))
1730 return attr->mode;
1731 return 0;
1732 } else if (attr == &dev_attr_nvm_version.attr) {
1733 if (nvm_readable(sw))
1734 return attr->mode;
1735 return 0;
1736 } else if (attr == &dev_attr_boot.attr) {
1737 if (tb_route(sw))
1738 return attr->mode;
1739 return 0;
1740 } else if (attr == &dev_attr_nvm_authenticate_on_disconnect.attr) {
1741 if (sw->quirks & QUIRK_FORCE_POWER_LINK_CONTROLLER)
1742 return attr->mode;
1743 return 0;
1744 }
1745
1746 return sw->safe_mode ? 0 : attr->mode;
1747}
1748
1749static struct attribute_group switch_group = {
1750 .is_visible = switch_attr_is_visible,
1751 .attrs = switch_attrs,
1752};
1753
1754static const struct attribute_group *switch_groups[] = {
1755 &switch_group,
1756 NULL,
1757};
1758
1759static void tb_switch_release(struct device *dev)
1760{
1761 struct tb_switch *sw = tb_to_switch(dev);
1762 struct tb_port *port;
1763
1764 dma_port_free(sw->dma_port);
1765
1766 tb_switch_for_each_port(sw, port) {
1767 if (!port->disabled) {
1768 ida_destroy(&port->in_hopids);
1769 ida_destroy(&port->out_hopids);
1770 }
1771 }
1772
1773 kfree(sw->uuid);
1774 kfree(sw->device_name);
1775 kfree(sw->vendor_name);
1776 kfree(sw->ports);
1777 kfree(sw->drom);
1778 kfree(sw->key);
1779 kfree(sw);
1780}
1781
1782
1783
1784
1785
1786static int __maybe_unused tb_switch_runtime_suspend(struct device *dev)
1787{
1788 struct tb_switch *sw = tb_to_switch(dev);
1789 const struct tb_cm_ops *cm_ops = sw->tb->cm_ops;
1790
1791 if (cm_ops->runtime_suspend_switch)
1792 return cm_ops->runtime_suspend_switch(sw);
1793
1794 return 0;
1795}
1796
1797static int __maybe_unused tb_switch_runtime_resume(struct device *dev)
1798{
1799 struct tb_switch *sw = tb_to_switch(dev);
1800 const struct tb_cm_ops *cm_ops = sw->tb->cm_ops;
1801
1802 if (cm_ops->runtime_resume_switch)
1803 return cm_ops->runtime_resume_switch(sw);
1804 return 0;
1805}
1806
1807static const struct dev_pm_ops tb_switch_pm_ops = {
1808 SET_RUNTIME_PM_OPS(tb_switch_runtime_suspend, tb_switch_runtime_resume,
1809 NULL)
1810};
1811
1812struct device_type tb_switch_type = {
1813 .name = "thunderbolt_device",
1814 .release = tb_switch_release,
1815 .pm = &tb_switch_pm_ops,
1816};
1817
1818static int tb_switch_get_generation(struct tb_switch *sw)
1819{
1820 switch (sw->config.device_id) {
1821 case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE:
1822 case PCI_DEVICE_ID_INTEL_EAGLE_RIDGE:
1823 case PCI_DEVICE_ID_INTEL_LIGHT_PEAK:
1824 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C:
1825 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C:
1826 case PCI_DEVICE_ID_INTEL_PORT_RIDGE:
1827 case PCI_DEVICE_ID_INTEL_REDWOOD_RIDGE_2C_BRIDGE:
1828 case PCI_DEVICE_ID_INTEL_REDWOOD_RIDGE_4C_BRIDGE:
1829 return 1;
1830
1831 case PCI_DEVICE_ID_INTEL_WIN_RIDGE_2C_BRIDGE:
1832 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE:
1833 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE:
1834 return 2;
1835
1836 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
1837 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
1838 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE:
1839 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
1840 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
1841 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_BRIDGE:
1842 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_BRIDGE:
1843 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_BRIDGE:
1844 case PCI_DEVICE_ID_INTEL_ICL_NHI0:
1845 case PCI_DEVICE_ID_INTEL_ICL_NHI1:
1846 return 3;
1847
1848 default:
1849 if (tb_switch_is_usb4(sw))
1850 return 4;
1851
1852
1853
1854
1855
1856 tb_sw_warn(sw, "unsupported switch device id %#x\n",
1857 sw->config.device_id);
1858 return 1;
1859 }
1860}
1861
1862static bool tb_switch_exceeds_max_depth(const struct tb_switch *sw, int depth)
1863{
1864 int max_depth;
1865
1866 if (tb_switch_is_usb4(sw) ||
1867 (sw->tb->root_switch && tb_switch_is_usb4(sw->tb->root_switch)))
1868 max_depth = USB4_SWITCH_MAX_DEPTH;
1869 else
1870 max_depth = TB_SWITCH_MAX_DEPTH;
1871
1872 return depth > max_depth;
1873}
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
1890 u64 route)
1891{
1892 struct tb_switch *sw;
1893 int upstream_port;
1894 int i, ret, depth;
1895
1896
1897 if (route) {
1898 struct tb_switch *parent_sw = tb_to_switch(parent);
1899 struct tb_port *down;
1900
1901 down = tb_port_at(route, parent_sw);
1902 tb_port_unlock(down);
1903 }
1904
1905 depth = tb_route_length(route);
1906
1907 upstream_port = tb_cfg_get_upstream_port(tb->ctl, route);
1908 if (upstream_port < 0)
1909 return ERR_PTR(upstream_port);
1910
1911 sw = kzalloc(sizeof(*sw), GFP_KERNEL);
1912 if (!sw)
1913 return ERR_PTR(-ENOMEM);
1914
1915 sw->tb = tb;
1916 ret = tb_cfg_read(tb->ctl, &sw->config, route, 0, TB_CFG_SWITCH, 0, 5);
1917 if (ret)
1918 goto err_free_sw_ports;
1919
1920 sw->generation = tb_switch_get_generation(sw);
1921
1922 tb_dbg(tb, "current switch config:\n");
1923 tb_dump_switch(tb, sw);
1924
1925
1926 sw->config.upstream_port_number = upstream_port;
1927 sw->config.depth = depth;
1928 sw->config.route_hi = upper_32_bits(route);
1929 sw->config.route_lo = lower_32_bits(route);
1930 sw->config.enabled = 0;
1931
1932
1933 if (tb_switch_exceeds_max_depth(sw, depth)) {
1934 ret = -EADDRNOTAVAIL;
1935 goto err_free_sw_ports;
1936 }
1937
1938
1939 sw->ports = kcalloc(sw->config.max_port_number + 1, sizeof(*sw->ports),
1940 GFP_KERNEL);
1941 if (!sw->ports) {
1942 ret = -ENOMEM;
1943 goto err_free_sw_ports;
1944 }
1945
1946 for (i = 0; i <= sw->config.max_port_number; i++) {
1947
1948 sw->ports[i].sw = sw;
1949 sw->ports[i].port = i;
1950 }
1951
1952 ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_PLUG_EVENTS);
1953 if (ret > 0)
1954 sw->cap_plug_events = ret;
1955
1956 ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_LINK_CONTROLLER);
1957 if (ret > 0)
1958 sw->cap_lc = ret;
1959
1960
1961 if (!route)
1962 sw->authorized = true;
1963
1964 device_initialize(&sw->dev);
1965 sw->dev.parent = parent;
1966 sw->dev.bus = &tb_bus_type;
1967 sw->dev.type = &tb_switch_type;
1968 sw->dev.groups = switch_groups;
1969 dev_set_name(&sw->dev, "%u-%llx", tb->index, tb_route(sw));
1970
1971 return sw;
1972
1973err_free_sw_ports:
1974 kfree(sw->ports);
1975 kfree(sw);
1976
1977 return ERR_PTR(ret);
1978}
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994struct tb_switch *
1995tb_switch_alloc_safe_mode(struct tb *tb, struct device *parent, u64 route)
1996{
1997 struct tb_switch *sw;
1998
1999 sw = kzalloc(sizeof(*sw), GFP_KERNEL);
2000 if (!sw)
2001 return ERR_PTR(-ENOMEM);
2002
2003 sw->tb = tb;
2004 sw->config.depth = tb_route_length(route);
2005 sw->config.route_hi = upper_32_bits(route);
2006 sw->config.route_lo = lower_32_bits(route);
2007 sw->safe_mode = true;
2008
2009 device_initialize(&sw->dev);
2010 sw->dev.parent = parent;
2011 sw->dev.bus = &tb_bus_type;
2012 sw->dev.type = &tb_switch_type;
2013 sw->dev.groups = switch_groups;
2014 dev_set_name(&sw->dev, "%u-%llx", tb->index, tb_route(sw));
2015
2016 return sw;
2017}
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030int tb_switch_configure(struct tb_switch *sw)
2031{
2032 struct tb *tb = sw->tb;
2033 u64 route;
2034 int ret;
2035
2036 route = tb_route(sw);
2037
2038 tb_dbg(tb, "%s Switch at %#llx (depth: %d, up port: %d)\n",
2039 sw->config.enabled ? "restoring" : "initializing", route,
2040 tb_route_length(route), sw->config.upstream_port_number);
2041
2042 sw->config.enabled = 1;
2043
2044 if (tb_switch_is_usb4(sw)) {
2045
2046
2047
2048
2049
2050 sw->config.cmuv = USB4_VERSION_1_0;
2051
2052
2053 ret = tb_sw_write(sw, (u32 *)&sw->config + 1, TB_CFG_SWITCH,
2054 ROUTER_CS_1, 4);
2055 if (ret)
2056 return ret;
2057
2058 ret = usb4_switch_setup(sw);
2059 } else {
2060 if (sw->config.vendor_id != PCI_VENDOR_ID_INTEL)
2061 tb_sw_warn(sw, "unknown switch vendor id %#x\n",
2062 sw->config.vendor_id);
2063
2064 if (!sw->cap_plug_events) {
2065 tb_sw_warn(sw, "cannot find TB_VSE_CAP_PLUG_EVENTS aborting\n");
2066 return -ENODEV;
2067 }
2068
2069
2070 ret = tb_sw_write(sw, (u32 *)&sw->config + 1, TB_CFG_SWITCH,
2071 ROUTER_CS_1, 3);
2072 }
2073 if (ret)
2074 return ret;
2075
2076 return tb_plug_events_active(sw, true);
2077}
2078
2079static int tb_switch_set_uuid(struct tb_switch *sw)
2080{
2081 bool uid = false;
2082 u32 uuid[4];
2083 int ret;
2084
2085 if (sw->uuid)
2086 return 0;
2087
2088 if (tb_switch_is_usb4(sw)) {
2089 ret = usb4_switch_read_uid(sw, &sw->uid);
2090 if (ret)
2091 return ret;
2092 uid = true;
2093 } else {
2094
2095
2096
2097
2098 ret = tb_lc_read_uuid(sw, uuid);
2099 if (ret) {
2100 if (ret != -EINVAL)
2101 return ret;
2102 uid = true;
2103 }
2104 }
2105
2106 if (uid) {
2107
2108
2109
2110
2111
2112
2113 uuid[0] = sw->uid & 0xffffffff;
2114 uuid[1] = (sw->uid >> 32) & 0xffffffff;
2115 uuid[2] = 0xffffffff;
2116 uuid[3] = 0xffffffff;
2117 }
2118
2119 sw->uuid = kmemdup(uuid, sizeof(uuid), GFP_KERNEL);
2120 if (!sw->uuid)
2121 return -ENOMEM;
2122 return 0;
2123}
2124
2125static int tb_switch_add_dma_port(struct tb_switch *sw)
2126{
2127 u32 status;
2128 int ret;
2129
2130 switch (sw->generation) {
2131 case 2:
2132
2133 if (tb_route(sw))
2134 return 0;
2135
2136 fallthrough;
2137 case 3:
2138 ret = tb_switch_set_uuid(sw);
2139 if (ret)
2140 return ret;
2141 break;
2142
2143 default:
2144
2145
2146
2147
2148 if (!sw->safe_mode)
2149 return 0;
2150 break;
2151 }
2152
2153
2154 if (!tb_route(sw) && !tb_switch_is_icm(sw))
2155 return 0;
2156
2157 sw->dma_port = dma_port_alloc(sw);
2158 if (!sw->dma_port)
2159 return 0;
2160
2161 if (sw->no_nvm_upgrade)
2162 return 0;
2163
2164
2165
2166
2167
2168
2169
2170 nvm_get_auth_status(sw, &status);
2171 if (status) {
2172 if (!tb_route(sw))
2173 nvm_authenticate_complete_dma_port(sw);
2174 return 0;
2175 }
2176
2177
2178
2179
2180
2181
2182 ret = dma_port_flash_update_auth_status(sw->dma_port, &status);
2183 if (ret <= 0)
2184 return ret;
2185
2186
2187 if (!tb_route(sw))
2188 nvm_authenticate_complete_dma_port(sw);
2189
2190 if (status) {
2191 tb_sw_info(sw, "switch flash authentication failed\n");
2192 nvm_set_auth_status(sw, status);
2193 }
2194
2195 tb_sw_info(sw, "power cycling the switch now\n");
2196 dma_port_power_cycle(sw->dma_port);
2197
2198
2199
2200
2201
2202 return -ESHUTDOWN;
2203}
2204
2205static void tb_switch_default_link_ports(struct tb_switch *sw)
2206{
2207 int i;
2208
2209 for (i = 1; i <= sw->config.max_port_number; i += 2) {
2210 struct tb_port *port = &sw->ports[i];
2211 struct tb_port *subordinate;
2212
2213 if (!tb_port_is_null(port))
2214 continue;
2215
2216
2217 if (i == sw->config.max_port_number ||
2218 !tb_port_is_null(&sw->ports[i + 1]))
2219 continue;
2220
2221
2222 subordinate = &sw->ports[i + 1];
2223 if (!port->dual_link_port && !subordinate->dual_link_port) {
2224 port->link_nr = 0;
2225 port->dual_link_port = subordinate;
2226 subordinate->link_nr = 1;
2227 subordinate->dual_link_port = port;
2228
2229 tb_sw_dbg(sw, "linked ports %d <-> %d\n",
2230 port->port, subordinate->port);
2231 }
2232 }
2233}
2234
2235static bool tb_switch_lane_bonding_possible(struct tb_switch *sw)
2236{
2237 const struct tb_port *up = tb_upstream_port(sw);
2238
2239 if (!up->dual_link_port || !up->dual_link_port->remote)
2240 return false;
2241
2242 if (tb_switch_is_usb4(sw))
2243 return usb4_switch_lane_bonding_possible(sw);
2244 return tb_lc_lane_bonding_possible(sw);
2245}
2246
2247static int tb_switch_update_link_attributes(struct tb_switch *sw)
2248{
2249 struct tb_port *up;
2250 bool change = false;
2251 int ret;
2252
2253 if (!tb_route(sw) || tb_switch_is_icm(sw))
2254 return 0;
2255
2256 up = tb_upstream_port(sw);
2257
2258 ret = tb_port_get_link_speed(up);
2259 if (ret < 0)
2260 return ret;
2261 if (sw->link_speed != ret)
2262 change = true;
2263 sw->link_speed = ret;
2264
2265 ret = tb_port_get_link_width(up);
2266 if (ret < 0)
2267 return ret;
2268 if (sw->link_width != ret)
2269 change = true;
2270 sw->link_width = ret;
2271
2272
2273 if (device_is_registered(&sw->dev) && change)
2274 kobject_uevent(&sw->dev.kobj, KOBJ_CHANGE);
2275
2276 return 0;
2277}
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287int tb_switch_lane_bonding_enable(struct tb_switch *sw)
2288{
2289 struct tb_switch *parent = tb_to_switch(sw->dev.parent);
2290 struct tb_port *up, *down;
2291 u64 route = tb_route(sw);
2292 int ret;
2293
2294 if (!route)
2295 return 0;
2296
2297 if (!tb_switch_lane_bonding_possible(sw))
2298 return 0;
2299
2300 up = tb_upstream_port(sw);
2301 down = tb_port_at(route, parent);
2302
2303 if (!tb_port_is_width_supported(up, 2) ||
2304 !tb_port_is_width_supported(down, 2))
2305 return 0;
2306
2307 ret = tb_port_lane_bonding_enable(up);
2308 if (ret) {
2309 tb_port_warn(up, "failed to enable lane bonding\n");
2310 return ret;
2311 }
2312
2313 ret = tb_port_lane_bonding_enable(down);
2314 if (ret) {
2315 tb_port_warn(down, "failed to enable lane bonding\n");
2316 tb_port_lane_bonding_disable(up);
2317 return ret;
2318 }
2319
2320 tb_switch_update_link_attributes(sw);
2321
2322 tb_sw_dbg(sw, "lane bonding enabled\n");
2323 return ret;
2324}
2325
2326
2327
2328
2329
2330
2331
2332
2333void tb_switch_lane_bonding_disable(struct tb_switch *sw)
2334{
2335 struct tb_switch *parent = tb_to_switch(sw->dev.parent);
2336 struct tb_port *up, *down;
2337
2338 if (!tb_route(sw))
2339 return;
2340
2341 up = tb_upstream_port(sw);
2342 if (!up->bonded)
2343 return;
2344
2345 down = tb_port_at(tb_route(sw), parent);
2346
2347 tb_port_lane_bonding_disable(up);
2348 tb_port_lane_bonding_disable(down);
2349
2350 tb_switch_update_link_attributes(sw);
2351 tb_sw_dbg(sw, "lane bonding disabled\n");
2352}
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366int tb_switch_configure_link(struct tb_switch *sw)
2367{
2368 struct tb_port *up, *down;
2369 int ret;
2370
2371 if (!tb_route(sw) || tb_switch_is_icm(sw))
2372 return 0;
2373
2374 up = tb_upstream_port(sw);
2375 if (tb_switch_is_usb4(up->sw))
2376 ret = usb4_port_configure(up);
2377 else
2378 ret = tb_lc_configure_port(up);
2379 if (ret)
2380 return ret;
2381
2382 down = up->remote;
2383 if (tb_switch_is_usb4(down->sw))
2384 return usb4_port_configure(down);
2385 return tb_lc_configure_port(down);
2386}
2387
2388
2389
2390
2391
2392
2393
2394
2395void tb_switch_unconfigure_link(struct tb_switch *sw)
2396{
2397 struct tb_port *up, *down;
2398
2399 if (sw->is_unplugged)
2400 return;
2401 if (!tb_route(sw) || tb_switch_is_icm(sw))
2402 return;
2403
2404 up = tb_upstream_port(sw);
2405 if (tb_switch_is_usb4(up->sw))
2406 usb4_port_unconfigure(up);
2407 else
2408 tb_lc_unconfigure_port(up);
2409
2410 down = up->remote;
2411 if (tb_switch_is_usb4(down->sw))
2412 usb4_port_unconfigure(down);
2413 else
2414 tb_lc_unconfigure_port(down);
2415}
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429int tb_switch_add(struct tb_switch *sw)
2430{
2431 int i, ret;
2432
2433
2434
2435
2436
2437
2438
2439
2440 ret = tb_switch_add_dma_port(sw);
2441 if (ret) {
2442 dev_err(&sw->dev, "failed to add DMA port\n");
2443 return ret;
2444 }
2445
2446 if (!sw->safe_mode) {
2447
2448 ret = tb_drom_read(sw);
2449 if (ret) {
2450 dev_err(&sw->dev, "reading DROM failed\n");
2451 return ret;
2452 }
2453 tb_sw_dbg(sw, "uid: %#llx\n", sw->uid);
2454
2455 ret = tb_switch_set_uuid(sw);
2456 if (ret) {
2457 dev_err(&sw->dev, "failed to set UUID\n");
2458 return ret;
2459 }
2460
2461 for (i = 0; i <= sw->config.max_port_number; i++) {
2462 if (sw->ports[i].disabled) {
2463 tb_port_dbg(&sw->ports[i], "disabled by eeprom\n");
2464 continue;
2465 }
2466 ret = tb_init_port(&sw->ports[i]);
2467 if (ret) {
2468 dev_err(&sw->dev, "failed to initialize port %d\n", i);
2469 return ret;
2470 }
2471 }
2472
2473 tb_switch_default_link_ports(sw);
2474
2475 ret = tb_switch_update_link_attributes(sw);
2476 if (ret)
2477 return ret;
2478
2479 ret = tb_switch_tmu_init(sw);
2480 if (ret)
2481 return ret;
2482 }
2483
2484 ret = device_add(&sw->dev);
2485 if (ret) {
2486 dev_err(&sw->dev, "failed to add device: %d\n", ret);
2487 return ret;
2488 }
2489
2490 if (tb_route(sw)) {
2491 dev_info(&sw->dev, "new device found, vendor=%#x device=%#x\n",
2492 sw->vendor, sw->device);
2493 if (sw->vendor_name && sw->device_name)
2494 dev_info(&sw->dev, "%s %s\n", sw->vendor_name,
2495 sw->device_name);
2496 }
2497
2498 ret = tb_switch_nvm_add(sw);
2499 if (ret) {
2500 dev_err(&sw->dev, "failed to add NVM devices\n");
2501 device_del(&sw->dev);
2502 return ret;
2503 }
2504
2505
2506
2507
2508
2509
2510 device_init_wakeup(&sw->dev, true);
2511
2512 pm_runtime_set_active(&sw->dev);
2513 if (sw->rpm) {
2514 pm_runtime_set_autosuspend_delay(&sw->dev, TB_AUTOSUSPEND_DELAY);
2515 pm_runtime_use_autosuspend(&sw->dev);
2516 pm_runtime_mark_last_busy(&sw->dev);
2517 pm_runtime_enable(&sw->dev);
2518 pm_request_autosuspend(&sw->dev);
2519 }
2520
2521 tb_switch_debugfs_init(sw);
2522 return 0;
2523}
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533void tb_switch_remove(struct tb_switch *sw)
2534{
2535 struct tb_port *port;
2536
2537 tb_switch_debugfs_remove(sw);
2538
2539 if (sw->rpm) {
2540 pm_runtime_get_sync(&sw->dev);
2541 pm_runtime_disable(&sw->dev);
2542 }
2543
2544
2545 tb_switch_for_each_port(sw, port) {
2546 if (tb_port_has_remote(port)) {
2547 tb_switch_remove(port->remote->sw);
2548 port->remote = NULL;
2549 } else if (port->xdomain) {
2550 tb_xdomain_remove(port->xdomain);
2551 port->xdomain = NULL;
2552 }
2553
2554
2555 tb_retimer_remove_all(port);
2556 }
2557
2558 if (!sw->is_unplugged)
2559 tb_plug_events_active(sw, false);
2560
2561 tb_switch_nvm_remove(sw);
2562
2563 if (tb_route(sw))
2564 dev_info(&sw->dev, "device disconnected\n");
2565 device_unregister(&sw->dev);
2566}
2567
2568
2569
2570
2571void tb_sw_set_unplugged(struct tb_switch *sw)
2572{
2573 struct tb_port *port;
2574
2575 if (sw == sw->tb->root_switch) {
2576 tb_sw_WARN(sw, "cannot unplug root switch\n");
2577 return;
2578 }
2579 if (sw->is_unplugged) {
2580 tb_sw_WARN(sw, "is_unplugged already set\n");
2581 return;
2582 }
2583 sw->is_unplugged = true;
2584 tb_switch_for_each_port(sw, port) {
2585 if (tb_port_has_remote(port))
2586 tb_sw_set_unplugged(port->remote->sw);
2587 else if (port->xdomain)
2588 port->xdomain->is_unplugged = true;
2589 }
2590}
2591
2592static int tb_switch_set_wake(struct tb_switch *sw, unsigned int flags)
2593{
2594 if (flags)
2595 tb_sw_dbg(sw, "enabling wakeup: %#x\n", flags);
2596 else
2597 tb_sw_dbg(sw, "disabling wakeup\n");
2598
2599 if (tb_switch_is_usb4(sw))
2600 return usb4_switch_set_wake(sw, flags);
2601 return tb_lc_set_wake(sw, flags);
2602}
2603
2604int tb_switch_resume(struct tb_switch *sw)
2605{
2606 struct tb_port *port;
2607 int err;
2608
2609 tb_sw_dbg(sw, "resuming switch\n");
2610
2611
2612
2613
2614
2615 if (tb_route(sw)) {
2616 u64 uid;
2617
2618
2619
2620
2621
2622
2623 err = tb_cfg_get_upstream_port(sw->tb->ctl, tb_route(sw));
2624 if (err < 0) {
2625 tb_sw_info(sw, "switch not present anymore\n");
2626 return err;
2627 }
2628
2629 if (tb_switch_is_usb4(sw))
2630 err = usb4_switch_read_uid(sw, &uid);
2631 else
2632 err = tb_drom_read_uid_only(sw, &uid);
2633 if (err) {
2634 tb_sw_warn(sw, "uid read failed\n");
2635 return err;
2636 }
2637 if (sw->uid != uid) {
2638 tb_sw_info(sw,
2639 "changed while suspended (uid %#llx -> %#llx)\n",
2640 sw->uid, uid);
2641 return -ENODEV;
2642 }
2643 }
2644
2645 err = tb_switch_configure(sw);
2646 if (err)
2647 return err;
2648
2649
2650 tb_switch_set_wake(sw, 0);
2651
2652 err = tb_switch_tmu_init(sw);
2653 if (err)
2654 return err;
2655
2656
2657 tb_switch_for_each_port(sw, port) {
2658 if (!tb_port_has_remote(port) && !port->xdomain)
2659 continue;
2660
2661 if (tb_wait_for_port(port, true) <= 0) {
2662 tb_port_warn(port,
2663 "lost during suspend, disconnecting\n");
2664 if (tb_port_has_remote(port))
2665 tb_sw_set_unplugged(port->remote->sw);
2666 else if (port->xdomain)
2667 port->xdomain->is_unplugged = true;
2668 } else if (tb_port_has_remote(port) || port->xdomain) {
2669
2670
2671
2672
2673 if (tb_port_unlock(port))
2674 tb_port_warn(port, "failed to unlock port\n");
2675 if (port->remote && tb_switch_resume(port->remote->sw)) {
2676 tb_port_warn(port,
2677 "lost during suspend, disconnecting\n");
2678 tb_sw_set_unplugged(port->remote->sw);
2679 }
2680 }
2681 }
2682 return 0;
2683}
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695void tb_switch_suspend(struct tb_switch *sw, bool runtime)
2696{
2697 unsigned int flags = 0;
2698 struct tb_port *port;
2699 int err;
2700
2701 tb_sw_dbg(sw, "suspending switch\n");
2702
2703 err = tb_plug_events_active(sw, false);
2704 if (err)
2705 return;
2706
2707 tb_switch_for_each_port(sw, port) {
2708 if (tb_port_has_remote(port))
2709 tb_switch_suspend(port->remote->sw, runtime);
2710 }
2711
2712 if (runtime) {
2713
2714 flags |= TB_WAKE_ON_CONNECT | TB_WAKE_ON_DISCONNECT;
2715 flags |= TB_WAKE_ON_USB4 | TB_WAKE_ON_USB3 | TB_WAKE_ON_PCIE;
2716 } else if (device_may_wakeup(&sw->dev)) {
2717 flags |= TB_WAKE_ON_USB4 | TB_WAKE_ON_USB3 | TB_WAKE_ON_PCIE;
2718 }
2719
2720 tb_switch_set_wake(sw, flags);
2721
2722 if (tb_switch_is_usb4(sw))
2723 usb4_switch_set_sleep(sw);
2724 else
2725 tb_lc_set_sleep(sw);
2726}
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736bool tb_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in)
2737{
2738 if (tb_switch_is_usb4(sw))
2739 return usb4_switch_query_dp_resource(sw, in);
2740 return tb_lc_dp_sink_query(sw, in);
2741}
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752int tb_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
2753{
2754 if (tb_switch_is_usb4(sw))
2755 return usb4_switch_alloc_dp_resource(sw, in);
2756 return tb_lc_dp_sink_alloc(sw, in);
2757}
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767void tb_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
2768{
2769 int ret;
2770
2771 if (tb_switch_is_usb4(sw))
2772 ret = usb4_switch_dealloc_dp_resource(sw, in);
2773 else
2774 ret = tb_lc_dp_sink_dealloc(sw, in);
2775
2776 if (ret)
2777 tb_sw_warn(sw, "failed to de-allocate DP resource for port %d\n",
2778 in->port);
2779}
2780
2781struct tb_sw_lookup {
2782 struct tb *tb;
2783 u8 link;
2784 u8 depth;
2785 const uuid_t *uuid;
2786 u64 route;
2787};
2788
2789static int tb_switch_match(struct device *dev, const void *data)
2790{
2791 struct tb_switch *sw = tb_to_switch(dev);
2792 const struct tb_sw_lookup *lookup = data;
2793
2794 if (!sw)
2795 return 0;
2796 if (sw->tb != lookup->tb)
2797 return 0;
2798
2799 if (lookup->uuid)
2800 return !memcmp(sw->uuid, lookup->uuid, sizeof(*lookup->uuid));
2801
2802 if (lookup->route) {
2803 return sw->config.route_lo == lower_32_bits(lookup->route) &&
2804 sw->config.route_hi == upper_32_bits(lookup->route);
2805 }
2806
2807
2808 if (!lookup->depth)
2809 return !sw->depth;
2810
2811 return sw->link == lookup->link && sw->depth == lookup->depth;
2812}
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link, u8 depth)
2824{
2825 struct tb_sw_lookup lookup;
2826 struct device *dev;
2827
2828 memset(&lookup, 0, sizeof(lookup));
2829 lookup.tb = tb;
2830 lookup.link = link;
2831 lookup.depth = depth;
2832
2833 dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match);
2834 if (dev)
2835 return tb_to_switch(dev);
2836
2837 return NULL;
2838}
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid)
2849{
2850 struct tb_sw_lookup lookup;
2851 struct device *dev;
2852
2853 memset(&lookup, 0, sizeof(lookup));
2854 lookup.tb = tb;
2855 lookup.uuid = uuid;
2856
2857 dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match);
2858 if (dev)
2859 return tb_to_switch(dev);
2860
2861 return NULL;
2862}
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route)
2873{
2874 struct tb_sw_lookup lookup;
2875 struct device *dev;
2876
2877 if (!route)
2878 return tb_switch_get(tb->root_switch);
2879
2880 memset(&lookup, 0, sizeof(lookup));
2881 lookup.tb = tb;
2882 lookup.route = route;
2883
2884 dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match);
2885 if (dev)
2886 return tb_to_switch(dev);
2887
2888 return NULL;
2889}
2890
2891
2892
2893
2894
2895
2896struct tb_port *tb_switch_find_port(struct tb_switch *sw,
2897 enum tb_port_type type)
2898{
2899 struct tb_port *port;
2900
2901 tb_switch_for_each_port(sw, port) {
2902 if (port->config.type == type)
2903 return port;
2904 }
2905
2906 return NULL;
2907}
2908