1 // SPDX-License-Identifier: GPL-2.0
3 * Thunderbolt driver - bus logic (NHI independent)
5 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
6 * Copyright (C) 2019, Intel Corporation
9 #include <linux/slab.h>
10 #include <linux/errno.h>
11 #include <linux/delay.h>
12 #include <linux/pm_runtime.h>
13 #include <linux/platform_data/x86/apple.h>
19 #define TB_TIMEOUT 100 /* ms */
22 * struct tb_cm - Simple Thunderbolt connection manager
23 * @tunnel_list: List of active tunnels
24 * @dp_resources: List of available DP resources for DP tunneling
25 * @hotplug_active: tb_handle_hotplug will stop progressing plug
26 * events and exit if this is not set (it needs to
27 * acquire the lock one more time). Used to drain wq
28 * after cfg has been paused.
29 * @remove_work: Work used to remove any unplugged routers after
33 struct list_head tunnel_list
;
34 struct list_head dp_resources
;
36 struct delayed_work remove_work
;
39 static inline struct tb
*tcm_to_tb(struct tb_cm
*tcm
)
41 return ((void *)tcm
- sizeof(struct tb
));
44 struct tb_hotplug_event
{
45 struct work_struct work
;
52 static void tb_handle_hotplug(struct work_struct
*work
);
54 static void tb_queue_hotplug(struct tb
*tb
, u64 route
, u8 port
, bool unplug
)
56 struct tb_hotplug_event
*ev
;
58 ev
= kmalloc(sizeof(*ev
), GFP_KERNEL
);
66 INIT_WORK(&ev
->work
, tb_handle_hotplug
);
67 queue_work(tb
->wq
, &ev
->work
);
70 /* enumeration & hot plug handling */
72 static void tb_add_dp_resources(struct tb_switch
*sw
)
74 struct tb_cm
*tcm
= tb_priv(sw
->tb
);
77 tb_switch_for_each_port(sw
, port
) {
78 if (!tb_port_is_dpin(port
))
81 if (!tb_switch_query_dp_resource(sw
, port
))
84 list_add_tail(&port
->list
, &tcm
->dp_resources
);
85 tb_port_dbg(port
, "DP IN resource available\n");
89 static void tb_remove_dp_resources(struct tb_switch
*sw
)
91 struct tb_cm
*tcm
= tb_priv(sw
->tb
);
92 struct tb_port
*port
, *tmp
;
94 /* Clear children resources first */
95 tb_switch_for_each_port(sw
, port
) {
96 if (tb_port_has_remote(port
))
97 tb_remove_dp_resources(port
->remote
->sw
);
100 list_for_each_entry_safe(port
, tmp
, &tcm
->dp_resources
, list
) {
101 if (port
->sw
== sw
) {
102 tb_port_dbg(port
, "DP OUT resource unavailable\n");
103 list_del_init(&port
->list
);
108 static void tb_discover_tunnels(struct tb_switch
*sw
)
110 struct tb
*tb
= sw
->tb
;
111 struct tb_cm
*tcm
= tb_priv(tb
);
112 struct tb_port
*port
;
114 tb_switch_for_each_port(sw
, port
) {
115 struct tb_tunnel
*tunnel
= NULL
;
117 switch (port
->config
.type
) {
118 case TB_TYPE_DP_HDMI_IN
:
119 tunnel
= tb_tunnel_discover_dp(tb
, port
);
122 case TB_TYPE_PCIE_DOWN
:
123 tunnel
= tb_tunnel_discover_pci(tb
, port
);
126 case TB_TYPE_USB3_DOWN
:
127 tunnel
= tb_tunnel_discover_usb3(tb
, port
);
137 if (tb_tunnel_is_pci(tunnel
)) {
138 struct tb_switch
*parent
= tunnel
->dst_port
->sw
;
140 while (parent
!= tunnel
->src_port
->sw
) {
142 parent
= tb_switch_parent(parent
);
144 } else if (tb_tunnel_is_dp(tunnel
)) {
145 /* Keep the domain from powering down */
146 pm_runtime_get_sync(&tunnel
->src_port
->sw
->dev
);
147 pm_runtime_get_sync(&tunnel
->dst_port
->sw
->dev
);
150 list_add_tail(&tunnel
->list
, &tcm
->tunnel_list
);
153 tb_switch_for_each_port(sw
, port
) {
154 if (tb_port_has_remote(port
))
155 tb_discover_tunnels(port
->remote
->sw
);
159 static int tb_port_configure_xdomain(struct tb_port
*port
)
162 * XDomain paths currently only support single lane so we must
163 * disable the other lane according to USB4 spec.
165 tb_port_disable(port
->dual_link_port
);
167 if (tb_switch_is_usb4(port
->sw
))
168 return usb4_port_configure_xdomain(port
);
169 return tb_lc_configure_xdomain(port
);
172 static void tb_port_unconfigure_xdomain(struct tb_port
*port
)
174 if (tb_switch_is_usb4(port
->sw
))
175 usb4_port_unconfigure_xdomain(port
);
177 tb_lc_unconfigure_xdomain(port
);
179 tb_port_enable(port
->dual_link_port
);
182 static void tb_scan_xdomain(struct tb_port
*port
)
184 struct tb_switch
*sw
= port
->sw
;
185 struct tb
*tb
= sw
->tb
;
186 struct tb_xdomain
*xd
;
189 if (!tb_is_xdomain_enabled())
192 route
= tb_downstream_route(port
);
193 xd
= tb_xdomain_find_by_route(tb
, route
);
199 xd
= tb_xdomain_alloc(tb
, &sw
->dev
, route
, tb
->root_switch
->uuid
,
202 tb_port_at(route
, sw
)->xdomain
= xd
;
203 tb_port_configure_xdomain(port
);
208 static int tb_enable_tmu(struct tb_switch
*sw
)
212 /* If it is already enabled in correct mode, don't touch it */
213 if (tb_switch_tmu_is_enabled(sw
))
216 ret
= tb_switch_tmu_disable(sw
);
220 ret
= tb_switch_tmu_post_time(sw
);
224 return tb_switch_tmu_enable(sw
);
228 * tb_find_unused_port() - return the first inactive port on @sw
229 * @sw: Switch to find the port on
230 * @type: Port type to look for
232 static struct tb_port
*tb_find_unused_port(struct tb_switch
*sw
,
233 enum tb_port_type type
)
235 struct tb_port
*port
;
237 tb_switch_for_each_port(sw
, port
) {
238 if (tb_is_upstream_port(port
))
240 if (port
->config
.type
!= type
)
244 if (tb_port_is_enabled(port
))
251 static struct tb_port
*tb_find_usb3_down(struct tb_switch
*sw
,
252 const struct tb_port
*port
)
254 struct tb_port
*down
;
256 down
= usb4_switch_map_usb3_down(sw
, port
);
257 if (down
&& !tb_usb3_port_is_enabled(down
))
262 static struct tb_tunnel
*tb_find_tunnel(struct tb
*tb
, enum tb_tunnel_type type
,
263 struct tb_port
*src_port
,
264 struct tb_port
*dst_port
)
266 struct tb_cm
*tcm
= tb_priv(tb
);
267 struct tb_tunnel
*tunnel
;
269 list_for_each_entry(tunnel
, &tcm
->tunnel_list
, list
) {
270 if (tunnel
->type
== type
&&
271 ((src_port
&& src_port
== tunnel
->src_port
) ||
272 (dst_port
&& dst_port
== tunnel
->dst_port
))) {
280 static struct tb_tunnel
*tb_find_first_usb3_tunnel(struct tb
*tb
,
281 struct tb_port
*src_port
,
282 struct tb_port
*dst_port
)
284 struct tb_port
*port
, *usb3_down
;
285 struct tb_switch
*sw
;
287 /* Pick the router that is deepest in the topology */
288 if (dst_port
->sw
->config
.depth
> src_port
->sw
->config
.depth
)
293 /* Can't be the host router */
294 if (sw
== tb
->root_switch
)
297 /* Find the downstream USB4 port that leads to this router */
298 port
= tb_port_at(tb_route(sw
), tb
->root_switch
);
299 /* Find the corresponding host router USB3 downstream port */
300 usb3_down
= usb4_switch_map_usb3_down(tb
->root_switch
, port
);
304 return tb_find_tunnel(tb
, TB_TUNNEL_USB3
, usb3_down
, NULL
);
307 static int tb_available_bandwidth(struct tb
*tb
, struct tb_port
*src_port
,
308 struct tb_port
*dst_port
, int *available_up
, int *available_down
)
310 int usb3_consumed_up
, usb3_consumed_down
, ret
;
311 struct tb_cm
*tcm
= tb_priv(tb
);
312 struct tb_tunnel
*tunnel
;
313 struct tb_port
*port
;
315 tb_port_dbg(dst_port
, "calculating available bandwidth\n");
317 tunnel
= tb_find_first_usb3_tunnel(tb
, src_port
, dst_port
);
319 ret
= tb_tunnel_consumed_bandwidth(tunnel
, &usb3_consumed_up
,
320 &usb3_consumed_down
);
324 usb3_consumed_up
= 0;
325 usb3_consumed_down
= 0;
328 *available_up
= *available_down
= 40000;
330 /* Find the minimum available bandwidth over all links */
331 tb_for_each_port_on_path(src_port
, dst_port
, port
) {
332 int link_speed
, link_width
, up_bw
, down_bw
;
334 if (!tb_port_is_null(port
))
337 if (tb_is_upstream_port(port
)) {
338 link_speed
= port
->sw
->link_speed
;
340 link_speed
= tb_port_get_link_speed(port
);
345 link_width
= port
->bonded
? 2 : 1;
347 up_bw
= link_speed
* link_width
* 1000; /* Mb/s */
348 /* Leave 10% guard band */
352 tb_port_dbg(port
, "link total bandwidth %d Mb/s\n", up_bw
);
355 * Find all DP tunnels that cross the port and reduce
356 * their consumed bandwidth from the available.
358 list_for_each_entry(tunnel
, &tcm
->tunnel_list
, list
) {
359 int dp_consumed_up
, dp_consumed_down
;
361 if (!tb_tunnel_is_dp(tunnel
))
364 if (!tb_tunnel_port_on_path(tunnel
, port
))
367 ret
= tb_tunnel_consumed_bandwidth(tunnel
,
373 up_bw
-= dp_consumed_up
;
374 down_bw
-= dp_consumed_down
;
378 * If USB3 is tunneled from the host router down to the
379 * branch leading to port we need to take USB3 consumed
380 * bandwidth into account regardless whether it actually
383 up_bw
-= usb3_consumed_up
;
384 down_bw
-= usb3_consumed_down
;
386 if (up_bw
< *available_up
)
387 *available_up
= up_bw
;
388 if (down_bw
< *available_down
)
389 *available_down
= down_bw
;
392 if (*available_up
< 0)
394 if (*available_down
< 0)
400 static int tb_release_unused_usb3_bandwidth(struct tb
*tb
,
401 struct tb_port
*src_port
,
402 struct tb_port
*dst_port
)
404 struct tb_tunnel
*tunnel
;
406 tunnel
= tb_find_first_usb3_tunnel(tb
, src_port
, dst_port
);
407 return tunnel
? tb_tunnel_release_unused_bandwidth(tunnel
) : 0;
410 static void tb_reclaim_usb3_bandwidth(struct tb
*tb
, struct tb_port
*src_port
,
411 struct tb_port
*dst_port
)
413 int ret
, available_up
, available_down
;
414 struct tb_tunnel
*tunnel
;
416 tunnel
= tb_find_first_usb3_tunnel(tb
, src_port
, dst_port
);
420 tb_dbg(tb
, "reclaiming unused bandwidth for USB3\n");
423 * Calculate available bandwidth for the first hop USB3 tunnel.
424 * That determines the whole USB3 bandwidth for this branch.
426 ret
= tb_available_bandwidth(tb
, tunnel
->src_port
, tunnel
->dst_port
,
427 &available_up
, &available_down
);
429 tb_warn(tb
, "failed to calculate available bandwidth\n");
433 tb_dbg(tb
, "available bandwidth for USB3 %d/%d Mb/s\n",
434 available_up
, available_down
);
436 tb_tunnel_reclaim_available_bandwidth(tunnel
, &available_up
, &available_down
);
439 static int tb_tunnel_usb3(struct tb
*tb
, struct tb_switch
*sw
)
441 struct tb_switch
*parent
= tb_switch_parent(sw
);
442 int ret
, available_up
, available_down
;
443 struct tb_port
*up
, *down
, *port
;
444 struct tb_cm
*tcm
= tb_priv(tb
);
445 struct tb_tunnel
*tunnel
;
447 if (!tb_acpi_may_tunnel_usb3()) {
448 tb_dbg(tb
, "USB3 tunneling disabled, not creating tunnel\n");
452 up
= tb_switch_find_port(sw
, TB_TYPE_USB3_UP
);
460 * Look up available down port. Since we are chaining it should
461 * be found right above this switch.
463 port
= tb_port_at(tb_route(sw
), parent
);
464 down
= tb_find_usb3_down(parent
, port
);
468 if (tb_route(parent
)) {
469 struct tb_port
*parent_up
;
471 * Check first that the parent switch has its upstream USB3
472 * port enabled. Otherwise the chain is not complete and
473 * there is no point setting up a new tunnel.
475 parent_up
= tb_switch_find_port(parent
, TB_TYPE_USB3_UP
);
476 if (!parent_up
|| !tb_port_is_enabled(parent_up
))
479 /* Make all unused bandwidth available for the new tunnel */
480 ret
= tb_release_unused_usb3_bandwidth(tb
, down
, up
);
485 ret
= tb_available_bandwidth(tb
, down
, up
, &available_up
,
490 tb_port_dbg(up
, "available bandwidth for new USB3 tunnel %d/%d Mb/s\n",
491 available_up
, available_down
);
493 tunnel
= tb_tunnel_alloc_usb3(tb
, up
, down
, available_up
,
500 if (tb_tunnel_activate(tunnel
)) {
502 "USB3 tunnel activation failed, aborting\n");
507 list_add_tail(&tunnel
->list
, &tcm
->tunnel_list
);
508 if (tb_route(parent
))
509 tb_reclaim_usb3_bandwidth(tb
, down
, up
);
514 tb_tunnel_free(tunnel
);
516 if (tb_route(parent
))
517 tb_reclaim_usb3_bandwidth(tb
, down
, up
);
522 static int tb_create_usb3_tunnels(struct tb_switch
*sw
)
524 struct tb_port
*port
;
527 if (!tb_acpi_may_tunnel_usb3())
531 ret
= tb_tunnel_usb3(sw
->tb
, sw
);
536 tb_switch_for_each_port(sw
, port
) {
537 if (!tb_port_has_remote(port
))
539 ret
= tb_create_usb3_tunnels(port
->remote
->sw
);
547 static void tb_scan_port(struct tb_port
*port
);
550 * tb_scan_switch() - scan for and initialize downstream switches
552 static void tb_scan_switch(struct tb_switch
*sw
)
554 struct tb_port
*port
;
556 pm_runtime_get_sync(&sw
->dev
);
558 tb_switch_for_each_port(sw
, port
)
561 pm_runtime_mark_last_busy(&sw
->dev
);
562 pm_runtime_put_autosuspend(&sw
->dev
);
566 * tb_scan_port() - check for and initialize switches below port
568 static void tb_scan_port(struct tb_port
*port
)
570 struct tb_cm
*tcm
= tb_priv(port
->sw
->tb
);
571 struct tb_port
*upstream_port
;
572 struct tb_switch
*sw
;
574 if (tb_is_upstream_port(port
))
577 if (tb_port_is_dpout(port
) && tb_dp_port_hpd_is_active(port
) == 1 &&
578 !tb_dp_port_is_enabled(port
)) {
579 tb_port_dbg(port
, "DP adapter HPD set, queuing hotplug\n");
580 tb_queue_hotplug(port
->sw
->tb
, tb_route(port
->sw
), port
->port
,
585 if (port
->config
.type
!= TB_TYPE_PORT
)
587 if (port
->dual_link_port
&& port
->link_nr
)
589 * Downstream switch is reachable through two ports.
590 * Only scan on the primary port (link_nr == 0).
592 if (tb_wait_for_port(port
, false) <= 0)
595 tb_port_dbg(port
, "port already has a remote\n");
599 tb_retimer_scan(port
, true);
601 sw
= tb_switch_alloc(port
->sw
->tb
, &port
->sw
->dev
,
602 tb_downstream_route(port
));
605 * If there is an error accessing the connected switch
606 * it may be connected to another domain. Also we allow
607 * the other domain to be connected to a max depth switch.
609 if (PTR_ERR(sw
) == -EIO
|| PTR_ERR(sw
) == -EADDRNOTAVAIL
)
610 tb_scan_xdomain(port
);
614 if (tb_switch_configure(sw
)) {
620 * If there was previously another domain connected remove it
624 tb_xdomain_remove(port
->xdomain
);
625 tb_port_unconfigure_xdomain(port
);
626 port
->xdomain
= NULL
;
630 * Do not send uevents until we have discovered all existing
631 * tunnels and know which switches were authorized already by
634 if (!tcm
->hotplug_active
)
635 dev_set_uevent_suppress(&sw
->dev
, true);
638 * At the moment Thunderbolt 2 and beyond (devices with LC) we
639 * can support runtime PM.
641 sw
->rpm
= sw
->generation
> 1;
643 if (tb_switch_add(sw
)) {
648 /* Link the switches using both links if available */
649 upstream_port
= tb_upstream_port(sw
);
650 port
->remote
= upstream_port
;
651 upstream_port
->remote
= port
;
652 if (port
->dual_link_port
&& upstream_port
->dual_link_port
) {
653 port
->dual_link_port
->remote
= upstream_port
->dual_link_port
;
654 upstream_port
->dual_link_port
->remote
= port
->dual_link_port
;
657 /* Enable lane bonding if supported */
658 tb_switch_lane_bonding_enable(sw
);
659 /* Set the link configured */
660 tb_switch_configure_link(sw
);
662 if (tb_enable_tmu(sw
))
663 tb_sw_warn(sw
, "failed to enable TMU\n");
665 /* Scan upstream retimers */
666 tb_retimer_scan(upstream_port
, true);
669 * Create USB 3.x tunnels only when the switch is plugged to the
670 * domain. This is because we scan the domain also during discovery
671 * and want to discover existing USB 3.x tunnels before we create
674 if (tcm
->hotplug_active
&& tb_tunnel_usb3(sw
->tb
, sw
))
675 tb_sw_warn(sw
, "USB3 tunnel creation failed\n");
677 tb_add_dp_resources(sw
);
681 static void tb_deactivate_and_free_tunnel(struct tb_tunnel
*tunnel
)
683 struct tb_port
*src_port
, *dst_port
;
689 tb_tunnel_deactivate(tunnel
);
690 list_del(&tunnel
->list
);
693 src_port
= tunnel
->src_port
;
694 dst_port
= tunnel
->dst_port
;
696 switch (tunnel
->type
) {
699 * In case of DP tunnel make sure the DP IN resource is
700 * deallocated properly.
702 tb_switch_dealloc_dp_resource(src_port
->sw
, src_port
);
703 /* Now we can allow the domain to runtime suspend again */
704 pm_runtime_mark_last_busy(&dst_port
->sw
->dev
);
705 pm_runtime_put_autosuspend(&dst_port
->sw
->dev
);
706 pm_runtime_mark_last_busy(&src_port
->sw
->dev
);
707 pm_runtime_put_autosuspend(&src_port
->sw
->dev
);
711 tb_reclaim_usb3_bandwidth(tb
, src_port
, dst_port
);
716 * PCIe and DMA tunnels do not consume guaranteed
722 tb_tunnel_free(tunnel
);
726 * tb_free_invalid_tunnels() - destroy tunnels of devices that have gone away
728 static void tb_free_invalid_tunnels(struct tb
*tb
)
730 struct tb_cm
*tcm
= tb_priv(tb
);
731 struct tb_tunnel
*tunnel
;
734 list_for_each_entry_safe(tunnel
, n
, &tcm
->tunnel_list
, list
) {
735 if (tb_tunnel_is_invalid(tunnel
))
736 tb_deactivate_and_free_tunnel(tunnel
);
741 * tb_free_unplugged_children() - traverse hierarchy and free unplugged switches
743 static void tb_free_unplugged_children(struct tb_switch
*sw
)
745 struct tb_port
*port
;
747 tb_switch_for_each_port(sw
, port
) {
748 if (!tb_port_has_remote(port
))
751 if (port
->remote
->sw
->is_unplugged
) {
752 tb_retimer_remove_all(port
);
753 tb_remove_dp_resources(port
->remote
->sw
);
754 tb_switch_unconfigure_link(port
->remote
->sw
);
755 tb_switch_lane_bonding_disable(port
->remote
->sw
);
756 tb_switch_remove(port
->remote
->sw
);
758 if (port
->dual_link_port
)
759 port
->dual_link_port
->remote
= NULL
;
761 tb_free_unplugged_children(port
->remote
->sw
);
766 static struct tb_port
*tb_find_pcie_down(struct tb_switch
*sw
,
767 const struct tb_port
*port
)
769 struct tb_port
*down
= NULL
;
772 * To keep plugging devices consistently in the same PCIe
773 * hierarchy, do mapping here for switch downstream PCIe ports.
775 if (tb_switch_is_usb4(sw
)) {
776 down
= usb4_switch_map_pcie_down(sw
, port
);
777 } else if (!tb_route(sw
)) {
778 int phy_port
= tb_phy_port_from_link(port
->port
);
782 * Hard-coded Thunderbolt port to PCIe down port mapping
785 if (tb_switch_is_cactus_ridge(sw
) ||
786 tb_switch_is_alpine_ridge(sw
))
787 index
= !phy_port
? 6 : 7;
788 else if (tb_switch_is_falcon_ridge(sw
))
789 index
= !phy_port
? 6 : 8;
790 else if (tb_switch_is_titan_ridge(sw
))
791 index
= !phy_port
? 8 : 9;
795 /* Validate the hard-coding */
796 if (WARN_ON(index
> sw
->config
.max_port_number
))
799 down
= &sw
->ports
[index
];
803 if (WARN_ON(!tb_port_is_pcie_down(down
)))
805 if (tb_pci_port_is_enabled(down
))
812 return tb_find_unused_port(sw
, TB_TYPE_PCIE_DOWN
);
815 static struct tb_port
*tb_find_dp_out(struct tb
*tb
, struct tb_port
*in
)
817 struct tb_port
*host_port
, *port
;
818 struct tb_cm
*tcm
= tb_priv(tb
);
820 host_port
= tb_route(in
->sw
) ?
821 tb_port_at(tb_route(in
->sw
), tb
->root_switch
) : NULL
;
823 list_for_each_entry(port
, &tcm
->dp_resources
, list
) {
824 if (!tb_port_is_dpout(port
))
827 if (tb_port_is_enabled(port
)) {
828 tb_port_dbg(port
, "in use\n");
832 tb_port_dbg(port
, "DP OUT available\n");
835 * Keep the DP tunnel under the topology starting from
836 * the same host router downstream port.
838 if (host_port
&& tb_route(port
->sw
)) {
841 p
= tb_port_at(tb_route(port
->sw
), tb
->root_switch
);
852 static void tb_tunnel_dp(struct tb
*tb
)
854 int available_up
, available_down
, ret
;
855 struct tb_cm
*tcm
= tb_priv(tb
);
856 struct tb_port
*port
, *in
, *out
;
857 struct tb_tunnel
*tunnel
;
859 if (!tb_acpi_may_tunnel_dp()) {
860 tb_dbg(tb
, "DP tunneling disabled, not creating tunnel\n");
865 * Find pair of inactive DP IN and DP OUT adapters and then
866 * establish a DP tunnel between them.
868 tb_dbg(tb
, "looking for DP IN <-> DP OUT pairs:\n");
872 list_for_each_entry(port
, &tcm
->dp_resources
, list
) {
873 if (!tb_port_is_dpin(port
))
876 if (tb_port_is_enabled(port
)) {
877 tb_port_dbg(port
, "in use\n");
881 tb_port_dbg(port
, "DP IN available\n");
883 out
= tb_find_dp_out(tb
, port
);
891 tb_dbg(tb
, "no suitable DP IN adapter available, not tunneling\n");
895 tb_dbg(tb
, "no suitable DP OUT adapter available, not tunneling\n");
900 * DP stream needs the domain to be active so runtime resume
901 * both ends of the tunnel.
903 * This should bring the routers in the middle active as well
904 * and keeps the domain from runtime suspending while the DP
907 pm_runtime_get_sync(&in
->sw
->dev
);
908 pm_runtime_get_sync(&out
->sw
->dev
);
910 if (tb_switch_alloc_dp_resource(in
->sw
, in
)) {
911 tb_port_dbg(in
, "no resource available for DP IN, not tunneling\n");
915 /* Make all unused USB3 bandwidth available for the new DP tunnel */
916 ret
= tb_release_unused_usb3_bandwidth(tb
, in
, out
);
918 tb_warn(tb
, "failed to release unused bandwidth\n");
922 ret
= tb_available_bandwidth(tb
, in
, out
, &available_up
,
927 tb_dbg(tb
, "available bandwidth for new DP tunnel %u/%u Mb/s\n",
928 available_up
, available_down
);
930 tunnel
= tb_tunnel_alloc_dp(tb
, in
, out
, available_up
, available_down
);
932 tb_port_dbg(out
, "could not allocate DP tunnel\n");
936 if (tb_tunnel_activate(tunnel
)) {
937 tb_port_info(out
, "DP tunnel activation failed, aborting\n");
941 list_add_tail(&tunnel
->list
, &tcm
->tunnel_list
);
942 tb_reclaim_usb3_bandwidth(tb
, in
, out
);
946 tb_tunnel_free(tunnel
);
948 tb_reclaim_usb3_bandwidth(tb
, in
, out
);
950 tb_switch_dealloc_dp_resource(in
->sw
, in
);
952 pm_runtime_mark_last_busy(&out
->sw
->dev
);
953 pm_runtime_put_autosuspend(&out
->sw
->dev
);
954 pm_runtime_mark_last_busy(&in
->sw
->dev
);
955 pm_runtime_put_autosuspend(&in
->sw
->dev
);
958 static void tb_dp_resource_unavailable(struct tb
*tb
, struct tb_port
*port
)
960 struct tb_port
*in
, *out
;
961 struct tb_tunnel
*tunnel
;
963 if (tb_port_is_dpin(port
)) {
964 tb_port_dbg(port
, "DP IN resource unavailable\n");
968 tb_port_dbg(port
, "DP OUT resource unavailable\n");
973 tunnel
= tb_find_tunnel(tb
, TB_TUNNEL_DP
, in
, out
);
974 tb_deactivate_and_free_tunnel(tunnel
);
975 list_del_init(&port
->list
);
978 * See if there is another DP OUT port that can be used for
979 * to create another tunnel.
984 static void tb_dp_resource_available(struct tb
*tb
, struct tb_port
*port
)
986 struct tb_cm
*tcm
= tb_priv(tb
);
989 if (tb_port_is_enabled(port
))
992 list_for_each_entry(p
, &tcm
->dp_resources
, list
) {
997 tb_port_dbg(port
, "DP %s resource available\n",
998 tb_port_is_dpin(port
) ? "IN" : "OUT");
999 list_add_tail(&port
->list
, &tcm
->dp_resources
);
1001 /* Look for suitable DP IN <-> DP OUT pairs now */
1005 static void tb_disconnect_and_release_dp(struct tb
*tb
)
1007 struct tb_cm
*tcm
= tb_priv(tb
);
1008 struct tb_tunnel
*tunnel
, *n
;
1011 * Tear down all DP tunnels and release their resources. They
1012 * will be re-established after resume based on plug events.
1014 list_for_each_entry_safe_reverse(tunnel
, n
, &tcm
->tunnel_list
, list
) {
1015 if (tb_tunnel_is_dp(tunnel
))
1016 tb_deactivate_and_free_tunnel(tunnel
);
1019 while (!list_empty(&tcm
->dp_resources
)) {
1020 struct tb_port
*port
;
1022 port
= list_first_entry(&tcm
->dp_resources
,
1023 struct tb_port
, list
);
1024 list_del_init(&port
->list
);
1028 static int tb_disconnect_pci(struct tb
*tb
, struct tb_switch
*sw
)
1030 struct tb_tunnel
*tunnel
;
1033 up
= tb_switch_find_port(sw
, TB_TYPE_PCIE_UP
);
1037 tunnel
= tb_find_tunnel(tb
, TB_TUNNEL_PCI
, NULL
, up
);
1038 if (WARN_ON(!tunnel
))
1041 tb_tunnel_deactivate(tunnel
);
1042 list_del(&tunnel
->list
);
1043 tb_tunnel_free(tunnel
);
1047 static int tb_tunnel_pci(struct tb
*tb
, struct tb_switch
*sw
)
1049 struct tb_port
*up
, *down
, *port
;
1050 struct tb_cm
*tcm
= tb_priv(tb
);
1051 struct tb_switch
*parent_sw
;
1052 struct tb_tunnel
*tunnel
;
1054 up
= tb_switch_find_port(sw
, TB_TYPE_PCIE_UP
);
1059 * Look up available down port. Since we are chaining it should
1060 * be found right above this switch.
1062 parent_sw
= tb_to_switch(sw
->dev
.parent
);
1063 port
= tb_port_at(tb_route(sw
), parent_sw
);
1064 down
= tb_find_pcie_down(parent_sw
, port
);
1068 tunnel
= tb_tunnel_alloc_pci(tb
, up
, down
);
1072 if (tb_tunnel_activate(tunnel
)) {
1074 "PCIe tunnel activation failed, aborting\n");
1075 tb_tunnel_free(tunnel
);
1079 list_add_tail(&tunnel
->list
, &tcm
->tunnel_list
);
1083 static int tb_approve_xdomain_paths(struct tb
*tb
, struct tb_xdomain
*xd
,
1084 int transmit_path
, int transmit_ring
,
1085 int receive_path
, int receive_ring
)
1087 struct tb_cm
*tcm
= tb_priv(tb
);
1088 struct tb_port
*nhi_port
, *dst_port
;
1089 struct tb_tunnel
*tunnel
;
1090 struct tb_switch
*sw
;
1092 sw
= tb_to_switch(xd
->dev
.parent
);
1093 dst_port
= tb_port_at(xd
->route
, sw
);
1094 nhi_port
= tb_switch_find_port(tb
->root_switch
, TB_TYPE_NHI
);
1096 mutex_lock(&tb
->lock
);
1097 tunnel
= tb_tunnel_alloc_dma(tb
, nhi_port
, dst_port
, transmit_path
,
1098 transmit_ring
, receive_path
, receive_ring
);
1100 mutex_unlock(&tb
->lock
);
1104 if (tb_tunnel_activate(tunnel
)) {
1105 tb_port_info(nhi_port
,
1106 "DMA tunnel activation failed, aborting\n");
1107 tb_tunnel_free(tunnel
);
1108 mutex_unlock(&tb
->lock
);
1112 list_add_tail(&tunnel
->list
, &tcm
->tunnel_list
);
1113 mutex_unlock(&tb
->lock
);
1117 static void __tb_disconnect_xdomain_paths(struct tb
*tb
, struct tb_xdomain
*xd
,
1118 int transmit_path
, int transmit_ring
,
1119 int receive_path
, int receive_ring
)
1121 struct tb_cm
*tcm
= tb_priv(tb
);
1122 struct tb_port
*nhi_port
, *dst_port
;
1123 struct tb_tunnel
*tunnel
, *n
;
1124 struct tb_switch
*sw
;
1126 sw
= tb_to_switch(xd
->dev
.parent
);
1127 dst_port
= tb_port_at(xd
->route
, sw
);
1128 nhi_port
= tb_switch_find_port(tb
->root_switch
, TB_TYPE_NHI
);
1130 list_for_each_entry_safe(tunnel
, n
, &tcm
->tunnel_list
, list
) {
1131 if (!tb_tunnel_is_dma(tunnel
))
1133 if (tunnel
->src_port
!= nhi_port
|| tunnel
->dst_port
!= dst_port
)
1136 if (tb_tunnel_match_dma(tunnel
, transmit_path
, transmit_ring
,
1137 receive_path
, receive_ring
))
1138 tb_deactivate_and_free_tunnel(tunnel
);
1142 static int tb_disconnect_xdomain_paths(struct tb
*tb
, struct tb_xdomain
*xd
,
1143 int transmit_path
, int transmit_ring
,
1144 int receive_path
, int receive_ring
)
1146 if (!xd
->is_unplugged
) {
1147 mutex_lock(&tb
->lock
);
1148 __tb_disconnect_xdomain_paths(tb
, xd
, transmit_path
,
1149 transmit_ring
, receive_path
,
1151 mutex_unlock(&tb
->lock
);
1156 /* hotplug handling */
1159 * tb_handle_hotplug() - handle hotplug event
1161 * Executes on tb->wq.
1163 static void tb_handle_hotplug(struct work_struct
*work
)
1165 struct tb_hotplug_event
*ev
= container_of(work
, typeof(*ev
), work
);
1166 struct tb
*tb
= ev
->tb
;
1167 struct tb_cm
*tcm
= tb_priv(tb
);
1168 struct tb_switch
*sw
;
1169 struct tb_port
*port
;
1171 /* Bring the domain back from sleep if it was suspended */
1172 pm_runtime_get_sync(&tb
->dev
);
1174 mutex_lock(&tb
->lock
);
1175 if (!tcm
->hotplug_active
)
1176 goto out
; /* during init, suspend or shutdown */
1178 sw
= tb_switch_find_by_route(tb
, ev
->route
);
1181 "hotplug event from non existent switch %llx:%x (unplug: %d)\n",
1182 ev
->route
, ev
->port
, ev
->unplug
);
1185 if (ev
->port
> sw
->config
.max_port_number
) {
1187 "hotplug event from non existent port %llx:%x (unplug: %d)\n",
1188 ev
->route
, ev
->port
, ev
->unplug
);
1191 port
= &sw
->ports
[ev
->port
];
1192 if (tb_is_upstream_port(port
)) {
1193 tb_dbg(tb
, "hotplug event for upstream port %llx:%x (unplug: %d)\n",
1194 ev
->route
, ev
->port
, ev
->unplug
);
1198 pm_runtime_get_sync(&sw
->dev
);
1201 tb_retimer_remove_all(port
);
1203 if (tb_port_has_remote(port
)) {
1204 tb_port_dbg(port
, "switch unplugged\n");
1205 tb_sw_set_unplugged(port
->remote
->sw
);
1206 tb_free_invalid_tunnels(tb
);
1207 tb_remove_dp_resources(port
->remote
->sw
);
1208 tb_switch_tmu_disable(port
->remote
->sw
);
1209 tb_switch_unconfigure_link(port
->remote
->sw
);
1210 tb_switch_lane_bonding_disable(port
->remote
->sw
);
1211 tb_switch_remove(port
->remote
->sw
);
1212 port
->remote
= NULL
;
1213 if (port
->dual_link_port
)
1214 port
->dual_link_port
->remote
= NULL
;
1215 /* Maybe we can create another DP tunnel */
1217 } else if (port
->xdomain
) {
1218 struct tb_xdomain
*xd
= tb_xdomain_get(port
->xdomain
);
1220 tb_port_dbg(port
, "xdomain unplugged\n");
1222 * Service drivers are unbound during
1223 * tb_xdomain_remove() so setting XDomain as
1224 * unplugged here prevents deadlock if they call
1225 * tb_xdomain_disable_paths(). We will tear down
1226 * all the tunnels below.
1228 xd
->is_unplugged
= true;
1229 tb_xdomain_remove(xd
);
1230 port
->xdomain
= NULL
;
1231 __tb_disconnect_xdomain_paths(tb
, xd
, -1, -1, -1, -1);
1233 tb_port_unconfigure_xdomain(port
);
1234 } else if (tb_port_is_dpout(port
) || tb_port_is_dpin(port
)) {
1235 tb_dp_resource_unavailable(tb
, port
);
1238 "got unplug event for disconnected port, ignoring\n");
1240 } else if (port
->remote
) {
1241 tb_port_dbg(port
, "got plug event for connected port, ignoring\n");
1243 if (tb_port_is_null(port
)) {
1244 tb_port_dbg(port
, "hotplug: scanning\n");
1247 tb_port_dbg(port
, "hotplug: no switch found\n");
1248 } else if (tb_port_is_dpout(port
) || tb_port_is_dpin(port
)) {
1249 tb_dp_resource_available(tb
, port
);
1253 pm_runtime_mark_last_busy(&sw
->dev
);
1254 pm_runtime_put_autosuspend(&sw
->dev
);
1259 mutex_unlock(&tb
->lock
);
1261 pm_runtime_mark_last_busy(&tb
->dev
);
1262 pm_runtime_put_autosuspend(&tb
->dev
);
1268 * tb_schedule_hotplug_handler() - callback function for the control channel
1270 * Delegates to tb_handle_hotplug.
1272 static void tb_handle_event(struct tb
*tb
, enum tb_cfg_pkg_type type
,
1273 const void *buf
, size_t size
)
1275 const struct cfg_event_pkg
*pkg
= buf
;
1278 if (type
!= TB_CFG_PKG_EVENT
) {
1279 tb_warn(tb
, "unexpected event %#x, ignoring\n", type
);
1283 route
= tb_cfg_get_route(&pkg
->header
);
1285 if (tb_cfg_ack_plug(tb
->ctl
, route
, pkg
->port
, pkg
->unplug
)) {
1286 tb_warn(tb
, "could not ack plug event on %llx:%x\n", route
,
1290 tb_queue_hotplug(tb
, route
, pkg
->port
, pkg
->unplug
);
1293 static void tb_stop(struct tb
*tb
)
1295 struct tb_cm
*tcm
= tb_priv(tb
);
1296 struct tb_tunnel
*tunnel
;
1297 struct tb_tunnel
*n
;
1299 cancel_delayed_work(&tcm
->remove_work
);
1300 /* tunnels are only present after everything has been initialized */
1301 list_for_each_entry_safe(tunnel
, n
, &tcm
->tunnel_list
, list
) {
1303 * DMA tunnels require the driver to be functional so we
1304 * tear them down. Other protocol tunnels can be left
1307 if (tb_tunnel_is_dma(tunnel
))
1308 tb_tunnel_deactivate(tunnel
);
1309 tb_tunnel_free(tunnel
);
1311 tb_switch_remove(tb
->root_switch
);
1312 tcm
->hotplug_active
= false; /* signal tb_handle_hotplug to quit */
1315 static int tb_scan_finalize_switch(struct device
*dev
, void *data
)
1317 if (tb_is_switch(dev
)) {
1318 struct tb_switch
*sw
= tb_to_switch(dev
);
1321 * If we found that the switch was already setup by the
1322 * boot firmware, mark it as authorized now before we
1323 * send uevent to userspace.
1328 dev_set_uevent_suppress(dev
, false);
1329 kobject_uevent(&dev
->kobj
, KOBJ_ADD
);
1330 device_for_each_child(dev
, NULL
, tb_scan_finalize_switch
);
1336 static int tb_start(struct tb
*tb
)
1338 struct tb_cm
*tcm
= tb_priv(tb
);
1341 tb
->root_switch
= tb_switch_alloc(tb
, &tb
->dev
, 0);
1342 if (IS_ERR(tb
->root_switch
))
1343 return PTR_ERR(tb
->root_switch
);
1346 * ICM firmware upgrade needs running firmware and in native
1347 * mode that is not available so disable firmware upgrade of the
1350 tb
->root_switch
->no_nvm_upgrade
= true;
1351 /* All USB4 routers support runtime PM */
1352 tb
->root_switch
->rpm
= tb_switch_is_usb4(tb
->root_switch
);
1354 ret
= tb_switch_configure(tb
->root_switch
);
1356 tb_switch_put(tb
->root_switch
);
1360 /* Announce the switch to the world */
1361 ret
= tb_switch_add(tb
->root_switch
);
1363 tb_switch_put(tb
->root_switch
);
1367 /* Enable TMU if it is off */
1368 tb_switch_tmu_enable(tb
->root_switch
);
1369 /* Full scan to discover devices added before the driver was loaded. */
1370 tb_scan_switch(tb
->root_switch
);
1371 /* Find out tunnels created by the boot firmware */
1372 tb_discover_tunnels(tb
->root_switch
);
1374 * If the boot firmware did not create USB 3.x tunnels create them
1375 * now for the whole topology.
1377 tb_create_usb3_tunnels(tb
->root_switch
);
1378 /* Add DP IN resources for the root switch */
1379 tb_add_dp_resources(tb
->root_switch
);
1380 /* Make the discovered switches available to the userspace */
1381 device_for_each_child(&tb
->root_switch
->dev
, NULL
,
1382 tb_scan_finalize_switch
);
1384 /* Allow tb_handle_hotplug to progress events */
1385 tcm
->hotplug_active
= true;
1389 static int tb_suspend_noirq(struct tb
*tb
)
1391 struct tb_cm
*tcm
= tb_priv(tb
);
1393 tb_dbg(tb
, "suspending...\n");
1394 tb_disconnect_and_release_dp(tb
);
1395 tb_switch_suspend(tb
->root_switch
, false);
1396 tcm
->hotplug_active
= false; /* signal tb_handle_hotplug to quit */
1397 tb_dbg(tb
, "suspend finished\n");
1402 static void tb_restore_children(struct tb_switch
*sw
)
1404 struct tb_port
*port
;
1406 /* No need to restore if the router is already unplugged */
1407 if (sw
->is_unplugged
)
1410 if (tb_enable_tmu(sw
))
1411 tb_sw_warn(sw
, "failed to restore TMU configuration\n");
1413 tb_switch_for_each_port(sw
, port
) {
1414 if (!tb_port_has_remote(port
) && !port
->xdomain
)
1418 tb_switch_lane_bonding_enable(port
->remote
->sw
);
1419 tb_switch_configure_link(port
->remote
->sw
);
1421 tb_restore_children(port
->remote
->sw
);
1422 } else if (port
->xdomain
) {
1423 tb_port_configure_xdomain(port
);
1428 static int tb_resume_noirq(struct tb
*tb
)
1430 struct tb_cm
*tcm
= tb_priv(tb
);
1431 struct tb_tunnel
*tunnel
, *n
;
1433 tb_dbg(tb
, "resuming...\n");
1435 /* remove any pci devices the firmware might have setup */
1436 tb_switch_reset(tb
->root_switch
);
1438 tb_switch_resume(tb
->root_switch
);
1439 tb_free_invalid_tunnels(tb
);
1440 tb_free_unplugged_children(tb
->root_switch
);
1441 tb_restore_children(tb
->root_switch
);
1442 list_for_each_entry_safe(tunnel
, n
, &tcm
->tunnel_list
, list
)
1443 tb_tunnel_restart(tunnel
);
1444 if (!list_empty(&tcm
->tunnel_list
)) {
1446 * the pcie links need some time to get going.
1447 * 100ms works for me...
1449 tb_dbg(tb
, "tunnels restarted, sleeping for 100ms\n");
1452 /* Allow tb_handle_hotplug to progress events */
1453 tcm
->hotplug_active
= true;
1454 tb_dbg(tb
, "resume finished\n");
1459 static int tb_free_unplugged_xdomains(struct tb_switch
*sw
)
1461 struct tb_port
*port
;
1464 tb_switch_for_each_port(sw
, port
) {
1465 if (tb_is_upstream_port(port
))
1467 if (port
->xdomain
&& port
->xdomain
->is_unplugged
) {
1468 tb_retimer_remove_all(port
);
1469 tb_xdomain_remove(port
->xdomain
);
1470 tb_port_unconfigure_xdomain(port
);
1471 port
->xdomain
= NULL
;
1473 } else if (port
->remote
) {
1474 ret
+= tb_free_unplugged_xdomains(port
->remote
->sw
);
1481 static int tb_freeze_noirq(struct tb
*tb
)
1483 struct tb_cm
*tcm
= tb_priv(tb
);
1485 tcm
->hotplug_active
= false;
1489 static int tb_thaw_noirq(struct tb
*tb
)
1491 struct tb_cm
*tcm
= tb_priv(tb
);
1493 tcm
->hotplug_active
= true;
1497 static void tb_complete(struct tb
*tb
)
1500 * Release any unplugged XDomains and if there is a case where
1501 * another domain is swapped in place of unplugged XDomain we
1502 * need to run another rescan.
1504 mutex_lock(&tb
->lock
);
1505 if (tb_free_unplugged_xdomains(tb
->root_switch
))
1506 tb_scan_switch(tb
->root_switch
);
1507 mutex_unlock(&tb
->lock
);
1510 static int tb_runtime_suspend(struct tb
*tb
)
1512 struct tb_cm
*tcm
= tb_priv(tb
);
1514 mutex_lock(&tb
->lock
);
1515 tb_switch_suspend(tb
->root_switch
, true);
1516 tcm
->hotplug_active
= false;
1517 mutex_unlock(&tb
->lock
);
1522 static void tb_remove_work(struct work_struct
*work
)
1524 struct tb_cm
*tcm
= container_of(work
, struct tb_cm
, remove_work
.work
);
1525 struct tb
*tb
= tcm_to_tb(tcm
);
1527 mutex_lock(&tb
->lock
);
1528 if (tb
->root_switch
) {
1529 tb_free_unplugged_children(tb
->root_switch
);
1530 tb_free_unplugged_xdomains(tb
->root_switch
);
1532 mutex_unlock(&tb
->lock
);
1535 static int tb_runtime_resume(struct tb
*tb
)
1537 struct tb_cm
*tcm
= tb_priv(tb
);
1538 struct tb_tunnel
*tunnel
, *n
;
1540 mutex_lock(&tb
->lock
);
1541 tb_switch_resume(tb
->root_switch
);
1542 tb_free_invalid_tunnels(tb
);
1543 tb_restore_children(tb
->root_switch
);
1544 list_for_each_entry_safe(tunnel
, n
, &tcm
->tunnel_list
, list
)
1545 tb_tunnel_restart(tunnel
);
1546 tcm
->hotplug_active
= true;
1547 mutex_unlock(&tb
->lock
);
1550 * Schedule cleanup of any unplugged devices. Run this in a
1551 * separate thread to avoid possible deadlock if the device
1552 * removal runtime resumes the unplugged device.
1554 queue_delayed_work(tb
->wq
, &tcm
->remove_work
, msecs_to_jiffies(50));
1558 static const struct tb_cm_ops tb_cm_ops
= {
1561 .suspend_noirq
= tb_suspend_noirq
,
1562 .resume_noirq
= tb_resume_noirq
,
1563 .freeze_noirq
= tb_freeze_noirq
,
1564 .thaw_noirq
= tb_thaw_noirq
,
1565 .complete
= tb_complete
,
1566 .runtime_suspend
= tb_runtime_suspend
,
1567 .runtime_resume
= tb_runtime_resume
,
1568 .handle_event
= tb_handle_event
,
1569 .disapprove_switch
= tb_disconnect_pci
,
1570 .approve_switch
= tb_tunnel_pci
,
1571 .approve_xdomain_paths
= tb_approve_xdomain_paths
,
1572 .disconnect_xdomain_paths
= tb_disconnect_xdomain_paths
,
1576 * During suspend the Thunderbolt controller is reset and all PCIe
1577 * tunnels are lost. The NHI driver will try to reestablish all tunnels
1578 * during resume. This adds device links between the tunneled PCIe
1579 * downstream ports and the NHI so that the device core will make sure
1580 * NHI is resumed first before the rest.
1582 static void tb_apple_add_links(struct tb_nhi
*nhi
)
1584 struct pci_dev
*upstream
, *pdev
;
1586 if (!x86_apple_machine
)
1589 switch (nhi
->pdev
->device
) {
1590 case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE
:
1591 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C
:
1592 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI
:
1593 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI
:
1599 upstream
= pci_upstream_bridge(nhi
->pdev
);
1601 if (!pci_is_pcie(upstream
))
1603 if (pci_pcie_type(upstream
) == PCI_EXP_TYPE_UPSTREAM
)
1605 upstream
= pci_upstream_bridge(upstream
);
1612 * For each hotplug downstream port, create add device link
1613 * back to NHI so that PCIe tunnels can be re-established after
1616 for_each_pci_bridge(pdev
, upstream
->subordinate
) {
1617 const struct device_link
*link
;
1619 if (!pci_is_pcie(pdev
))
1621 if (pci_pcie_type(pdev
) != PCI_EXP_TYPE_DOWNSTREAM
||
1622 !pdev
->is_hotplug_bridge
)
1625 link
= device_link_add(&pdev
->dev
, &nhi
->pdev
->dev
,
1626 DL_FLAG_AUTOREMOVE_SUPPLIER
|
1627 DL_FLAG_PM_RUNTIME
);
1629 dev_dbg(&nhi
->pdev
->dev
, "created link from %s\n",
1630 dev_name(&pdev
->dev
));
1632 dev_warn(&nhi
->pdev
->dev
, "device link creation from %s failed\n",
1633 dev_name(&pdev
->dev
));
1638 struct tb
*tb_probe(struct tb_nhi
*nhi
)
1643 tb
= tb_domain_alloc(nhi
, TB_TIMEOUT
, sizeof(*tcm
));
1647 if (tb_acpi_may_tunnel_pcie())
1648 tb
->security_level
= TB_SECURITY_USER
;
1650 tb
->security_level
= TB_SECURITY_NOPCIE
;
1652 tb
->cm_ops
= &tb_cm_ops
;
1655 INIT_LIST_HEAD(&tcm
->tunnel_list
);
1656 INIT_LIST_HEAD(&tcm
->dp_resources
);
1657 INIT_DELAYED_WORK(&tcm
->remove_work
, tb_remove_work
);
1659 tb_dbg(tb
, "using software connection manager\n");
1661 tb_apple_add_links(nhi
);
1662 tb_acpi_add_links(nhi
);