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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
d6cc51cd | 2 | /* |
99cabbb0 | 3 | * Thunderbolt driver - bus logic (NHI independent) |
d6cc51cd AN |
4 | * |
5 | * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com> | |
99cabbb0 | 6 | * Copyright (C) 2019, Intel Corporation |
d6cc51cd AN |
7 | */ |
8 | ||
9 | #include <linux/slab.h> | |
10 | #include <linux/errno.h> | |
11 | #include <linux/delay.h> | |
6ac6faee | 12 | #include <linux/pm_runtime.h> |
349bfe08 | 13 | #include <linux/platform_data/x86/apple.h> |
d6cc51cd AN |
14 | |
15 | #include "tb.h" | |
7adf6097 | 16 | #include "tb_regs.h" |
1752b9f7 | 17 | #include "tunnel.h" |
d6cc51cd | 18 | |
6ce35635 MW |
19 | #define TB_TIMEOUT 100 /* ms */ |
20 | #define MAX_GROUPS 7 /* max Group_ID is 7 */ | |
7f0a34d7 | 21 | |
9d3cce0b MW |
22 | /** |
23 | * struct tb_cm - Simple Thunderbolt connection manager | |
24 | * @tunnel_list: List of active tunnels | |
8afe909b | 25 | * @dp_resources: List of available DP resources for DP tunneling |
9d3cce0b MW |
26 | * @hotplug_active: tb_handle_hotplug will stop progressing plug |
27 | * events and exit if this is not set (it needs to | |
28 | * acquire the lock one more time). Used to drain wq | |
29 | * after cfg has been paused. | |
6ac6faee MW |
30 | * @remove_work: Work used to remove any unplugged routers after |
31 | * runtime resume | |
6ce35635 | 32 | * @groups: Bandwidth groups used in this domain. |
9d3cce0b MW |
33 | */ |
34 | struct tb_cm { | |
35 | struct list_head tunnel_list; | |
8afe909b | 36 | struct list_head dp_resources; |
9d3cce0b | 37 | bool hotplug_active; |
6ac6faee | 38 | struct delayed_work remove_work; |
6ce35635 | 39 | struct tb_bandwidth_group groups[MAX_GROUPS]; |
9d3cce0b | 40 | }; |
9da672a4 | 41 | |
6ac6faee MW |
42 | static inline struct tb *tcm_to_tb(struct tb_cm *tcm) |
43 | { | |
44 | return ((void *)tcm - sizeof(struct tb)); | |
45 | } | |
46 | ||
4f807e47 MW |
47 | struct tb_hotplug_event { |
48 | struct work_struct work; | |
49 | struct tb *tb; | |
50 | u64 route; | |
51 | u8 port; | |
52 | bool unplug; | |
53 | }; | |
54 | ||
6ce35635 MW |
55 | static void tb_init_bandwidth_groups(struct tb_cm *tcm) |
56 | { | |
57 | int i; | |
58 | ||
59 | for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { | |
60 | struct tb_bandwidth_group *group = &tcm->groups[i]; | |
61 | ||
62 | group->tb = tcm_to_tb(tcm); | |
63 | group->index = i + 1; | |
64 | INIT_LIST_HEAD(&group->ports); | |
65 | } | |
66 | } | |
67 | ||
68 | static void tb_bandwidth_group_attach_port(struct tb_bandwidth_group *group, | |
69 | struct tb_port *in) | |
70 | { | |
71 | if (!group || WARN_ON(in->group)) | |
72 | return; | |
73 | ||
74 | in->group = group; | |
75 | list_add_tail(&in->group_list, &group->ports); | |
76 | ||
77 | tb_port_dbg(in, "attached to bandwidth group %d\n", group->index); | |
78 | } | |
79 | ||
80 | static struct tb_bandwidth_group *tb_find_free_bandwidth_group(struct tb_cm *tcm) | |
81 | { | |
82 | int i; | |
83 | ||
84 | for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { | |
85 | struct tb_bandwidth_group *group = &tcm->groups[i]; | |
86 | ||
87 | if (list_empty(&group->ports)) | |
88 | return group; | |
89 | } | |
90 | ||
91 | return NULL; | |
92 | } | |
93 | ||
94 | static struct tb_bandwidth_group * | |
95 | tb_attach_bandwidth_group(struct tb_cm *tcm, struct tb_port *in, | |
96 | struct tb_port *out) | |
97 | { | |
98 | struct tb_bandwidth_group *group; | |
99 | struct tb_tunnel *tunnel; | |
100 | ||
101 | /* | |
102 | * Find all DP tunnels that go through all the same USB4 links | |
103 | * as this one. Because we always setup tunnels the same way we | |
104 | * can just check for the routers at both ends of the tunnels | |
105 | * and if they are the same we have a match. | |
106 | */ | |
107 | list_for_each_entry(tunnel, &tcm->tunnel_list, list) { | |
108 | if (!tb_tunnel_is_dp(tunnel)) | |
109 | continue; | |
110 | ||
111 | if (tunnel->src_port->sw == in->sw && | |
112 | tunnel->dst_port->sw == out->sw) { | |
113 | group = tunnel->src_port->group; | |
114 | if (group) { | |
115 | tb_bandwidth_group_attach_port(group, in); | |
116 | return group; | |
117 | } | |
118 | } | |
119 | } | |
120 | ||
121 | /* Pick up next available group then */ | |
122 | group = tb_find_free_bandwidth_group(tcm); | |
123 | if (group) | |
124 | tb_bandwidth_group_attach_port(group, in); | |
125 | else | |
126 | tb_port_warn(in, "no available bandwidth groups\n"); | |
127 | ||
128 | return group; | |
129 | } | |
130 | ||
131 | static void tb_discover_bandwidth_group(struct tb_cm *tcm, struct tb_port *in, | |
132 | struct tb_port *out) | |
133 | { | |
134 | if (usb4_dp_port_bw_mode_enabled(in)) { | |
135 | int index, i; | |
136 | ||
137 | index = usb4_dp_port_group_id(in); | |
138 | for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { | |
139 | if (tcm->groups[i].index == index) { | |
140 | tb_bandwidth_group_attach_port(&tcm->groups[i], in); | |
141 | return; | |
142 | } | |
143 | } | |
144 | } | |
145 | ||
146 | tb_attach_bandwidth_group(tcm, in, out); | |
147 | } | |
148 | ||
149 | static void tb_detach_bandwidth_group(struct tb_port *in) | |
150 | { | |
151 | struct tb_bandwidth_group *group = in->group; | |
152 | ||
153 | if (group) { | |
154 | in->group = NULL; | |
155 | list_del_init(&in->group_list); | |
156 | ||
157 | tb_port_dbg(in, "detached from bandwidth group %d\n", group->index); | |
158 | } | |
159 | } | |
160 | ||
4f807e47 MW |
161 | static void tb_handle_hotplug(struct work_struct *work); |
162 | ||
163 | static void tb_queue_hotplug(struct tb *tb, u64 route, u8 port, bool unplug) | |
164 | { | |
165 | struct tb_hotplug_event *ev; | |
166 | ||
167 | ev = kmalloc(sizeof(*ev), GFP_KERNEL); | |
168 | if (!ev) | |
169 | return; | |
170 | ||
171 | ev->tb = tb; | |
172 | ev->route = route; | |
173 | ev->port = port; | |
174 | ev->unplug = unplug; | |
175 | INIT_WORK(&ev->work, tb_handle_hotplug); | |
176 | queue_work(tb->wq, &ev->work); | |
177 | } | |
178 | ||
9da672a4 AN |
179 | /* enumeration & hot plug handling */ |
180 | ||
8afe909b MW |
181 | static void tb_add_dp_resources(struct tb_switch *sw) |
182 | { | |
183 | struct tb_cm *tcm = tb_priv(sw->tb); | |
184 | struct tb_port *port; | |
185 | ||
186 | tb_switch_for_each_port(sw, port) { | |
187 | if (!tb_port_is_dpin(port)) | |
188 | continue; | |
189 | ||
190 | if (!tb_switch_query_dp_resource(sw, port)) | |
191 | continue; | |
192 | ||
193 | list_add_tail(&port->list, &tcm->dp_resources); | |
194 | tb_port_dbg(port, "DP IN resource available\n"); | |
195 | } | |
196 | } | |
197 | ||
198 | static void tb_remove_dp_resources(struct tb_switch *sw) | |
199 | { | |
200 | struct tb_cm *tcm = tb_priv(sw->tb); | |
201 | struct tb_port *port, *tmp; | |
202 | ||
203 | /* Clear children resources first */ | |
204 | tb_switch_for_each_port(sw, port) { | |
205 | if (tb_port_has_remote(port)) | |
206 | tb_remove_dp_resources(port->remote->sw); | |
207 | } | |
208 | ||
209 | list_for_each_entry_safe(port, tmp, &tcm->dp_resources, list) { | |
210 | if (port->sw == sw) { | |
211 | tb_port_dbg(port, "DP OUT resource unavailable\n"); | |
212 | list_del_init(&port->list); | |
213 | } | |
214 | } | |
215 | } | |
216 | ||
b60e31bf SM |
217 | static void tb_discover_dp_resource(struct tb *tb, struct tb_port *port) |
218 | { | |
219 | struct tb_cm *tcm = tb_priv(tb); | |
220 | struct tb_port *p; | |
221 | ||
222 | list_for_each_entry(p, &tcm->dp_resources, list) { | |
223 | if (p == port) | |
224 | return; | |
225 | } | |
226 | ||
227 | tb_port_dbg(port, "DP %s resource available discovered\n", | |
228 | tb_port_is_dpin(port) ? "IN" : "OUT"); | |
229 | list_add_tail(&port->list, &tcm->dp_resources); | |
230 | } | |
231 | ||
232 | static void tb_discover_dp_resources(struct tb *tb) | |
233 | { | |
234 | struct tb_cm *tcm = tb_priv(tb); | |
235 | struct tb_tunnel *tunnel; | |
236 | ||
237 | list_for_each_entry(tunnel, &tcm->tunnel_list, list) { | |
238 | if (tb_tunnel_is_dp(tunnel)) | |
239 | tb_discover_dp_resource(tb, tunnel->dst_port); | |
240 | } | |
241 | } | |
242 | ||
43bddb26 MW |
243 | static void tb_switch_discover_tunnels(struct tb_switch *sw, |
244 | struct list_head *list, | |
245 | bool alloc_hopids) | |
0414bec5 MW |
246 | { |
247 | struct tb *tb = sw->tb; | |
0414bec5 | 248 | struct tb_port *port; |
0414bec5 | 249 | |
b433d010 | 250 | tb_switch_for_each_port(sw, port) { |
0414bec5 MW |
251 | struct tb_tunnel *tunnel = NULL; |
252 | ||
0414bec5 | 253 | switch (port->config.type) { |
4f807e47 | 254 | case TB_TYPE_DP_HDMI_IN: |
43bddb26 | 255 | tunnel = tb_tunnel_discover_dp(tb, port, alloc_hopids); |
3084b48f GF |
256 | /* |
257 | * In case of DP tunnel exists, change host router's | |
258 | * 1st children TMU mode to HiFi for CL0s to work. | |
259 | */ | |
260 | if (tunnel) | |
261 | tb_switch_enable_tmu_1st_child(tb->root_switch, | |
262 | TB_SWITCH_TMU_RATE_HIFI); | |
4f807e47 MW |
263 | break; |
264 | ||
0414bec5 | 265 | case TB_TYPE_PCIE_DOWN: |
43bddb26 | 266 | tunnel = tb_tunnel_discover_pci(tb, port, alloc_hopids); |
0414bec5 MW |
267 | break; |
268 | ||
e6f81858 | 269 | case TB_TYPE_USB3_DOWN: |
43bddb26 | 270 | tunnel = tb_tunnel_discover_usb3(tb, port, alloc_hopids); |
e6f81858 RM |
271 | break; |
272 | ||
0414bec5 MW |
273 | default: |
274 | break; | |
275 | } | |
276 | ||
43bddb26 MW |
277 | if (tunnel) |
278 | list_add_tail(&tunnel->list, list); | |
279 | } | |
4f807e47 | 280 | |
43bddb26 MW |
281 | tb_switch_for_each_port(sw, port) { |
282 | if (tb_port_has_remote(port)) { | |
283 | tb_switch_discover_tunnels(port->remote->sw, list, | |
284 | alloc_hopids); | |
285 | } | |
286 | } | |
287 | } | |
288 | ||
289 | static void tb_discover_tunnels(struct tb *tb) | |
290 | { | |
291 | struct tb_cm *tcm = tb_priv(tb); | |
292 | struct tb_tunnel *tunnel; | |
293 | ||
294 | tb_switch_discover_tunnels(tb->root_switch, &tcm->tunnel_list, true); | |
295 | ||
296 | list_for_each_entry(tunnel, &tcm->tunnel_list, list) { | |
4f807e47 | 297 | if (tb_tunnel_is_pci(tunnel)) { |
0414bec5 MW |
298 | struct tb_switch *parent = tunnel->dst_port->sw; |
299 | ||
300 | while (parent != tunnel->src_port->sw) { | |
301 | parent->boot = true; | |
302 | parent = tb_switch_parent(parent); | |
303 | } | |
c94732bd | 304 | } else if (tb_tunnel_is_dp(tunnel)) { |
6ce35635 MW |
305 | struct tb_port *in = tunnel->src_port; |
306 | struct tb_port *out = tunnel->dst_port; | |
307 | ||
c94732bd | 308 | /* Keep the domain from powering down */ |
6ce35635 MW |
309 | pm_runtime_get_sync(&in->sw->dev); |
310 | pm_runtime_get_sync(&out->sw->dev); | |
311 | ||
312 | tb_discover_bandwidth_group(tcm, in, out); | |
0414bec5 | 313 | } |
0414bec5 MW |
314 | } |
315 | } | |
9da672a4 | 316 | |
f9cad07b | 317 | static int tb_port_configure_xdomain(struct tb_port *port, struct tb_xdomain *xd) |
284652a4 MW |
318 | { |
319 | if (tb_switch_is_usb4(port->sw)) | |
f9cad07b | 320 | return usb4_port_configure_xdomain(port, xd); |
284652a4 MW |
321 | return tb_lc_configure_xdomain(port); |
322 | } | |
323 | ||
324 | static void tb_port_unconfigure_xdomain(struct tb_port *port) | |
325 | { | |
326 | if (tb_switch_is_usb4(port->sw)) | |
327 | usb4_port_unconfigure_xdomain(port); | |
328 | else | |
329 | tb_lc_unconfigure_xdomain(port); | |
341d4518 MW |
330 | |
331 | tb_port_enable(port->dual_link_port); | |
284652a4 MW |
332 | } |
333 | ||
7ea4cd6b MW |
334 | static void tb_scan_xdomain(struct tb_port *port) |
335 | { | |
336 | struct tb_switch *sw = port->sw; | |
337 | struct tb *tb = sw->tb; | |
338 | struct tb_xdomain *xd; | |
339 | u64 route; | |
340 | ||
5ca67688 MW |
341 | if (!tb_is_xdomain_enabled()) |
342 | return; | |
343 | ||
7ea4cd6b MW |
344 | route = tb_downstream_route(port); |
345 | xd = tb_xdomain_find_by_route(tb, route); | |
346 | if (xd) { | |
347 | tb_xdomain_put(xd); | |
348 | return; | |
349 | } | |
350 | ||
351 | xd = tb_xdomain_alloc(tb, &sw->dev, route, tb->root_switch->uuid, | |
352 | NULL); | |
353 | if (xd) { | |
354 | tb_port_at(route, sw)->xdomain = xd; | |
f9cad07b | 355 | tb_port_configure_xdomain(port, xd); |
7ea4cd6b MW |
356 | tb_xdomain_add(xd); |
357 | } | |
358 | } | |
359 | ||
cf29b9af RM |
360 | static int tb_enable_tmu(struct tb_switch *sw) |
361 | { | |
362 | int ret; | |
363 | ||
364 | /* If it is already enabled in correct mode, don't touch it */ | |
b017a46d | 365 | if (tb_switch_tmu_is_enabled(sw, sw->tmu.unidirectional_request)) |
cf29b9af RM |
366 | return 0; |
367 | ||
368 | ret = tb_switch_tmu_disable(sw); | |
369 | if (ret) | |
370 | return ret; | |
371 | ||
372 | ret = tb_switch_tmu_post_time(sw); | |
373 | if (ret) | |
374 | return ret; | |
375 | ||
376 | return tb_switch_tmu_enable(sw); | |
377 | } | |
378 | ||
e6f81858 RM |
379 | /** |
380 | * tb_find_unused_port() - return the first inactive port on @sw | |
381 | * @sw: Switch to find the port on | |
382 | * @type: Port type to look for | |
383 | */ | |
384 | static struct tb_port *tb_find_unused_port(struct tb_switch *sw, | |
385 | enum tb_port_type type) | |
386 | { | |
387 | struct tb_port *port; | |
388 | ||
389 | tb_switch_for_each_port(sw, port) { | |
390 | if (tb_is_upstream_port(port)) | |
391 | continue; | |
392 | if (port->config.type != type) | |
393 | continue; | |
394 | if (!port->cap_adap) | |
395 | continue; | |
396 | if (tb_port_is_enabled(port)) | |
397 | continue; | |
398 | return port; | |
399 | } | |
400 | return NULL; | |
401 | } | |
402 | ||
403 | static struct tb_port *tb_find_usb3_down(struct tb_switch *sw, | |
77cfa40f | 404 | const struct tb_port *port) |
e6f81858 RM |
405 | { |
406 | struct tb_port *down; | |
407 | ||
408 | down = usb4_switch_map_usb3_down(sw, port); | |
77cfa40f | 409 | if (down && !tb_usb3_port_is_enabled(down)) |
e6f81858 | 410 | return down; |
77cfa40f | 411 | return NULL; |
e6f81858 RM |
412 | } |
413 | ||
0bd680cd MW |
414 | static struct tb_tunnel *tb_find_tunnel(struct tb *tb, enum tb_tunnel_type type, |
415 | struct tb_port *src_port, | |
416 | struct tb_port *dst_port) | |
417 | { | |
418 | struct tb_cm *tcm = tb_priv(tb); | |
419 | struct tb_tunnel *tunnel; | |
420 | ||
421 | list_for_each_entry(tunnel, &tcm->tunnel_list, list) { | |
422 | if (tunnel->type == type && | |
423 | ((src_port && src_port == tunnel->src_port) || | |
424 | (dst_port && dst_port == tunnel->dst_port))) { | |
425 | return tunnel; | |
426 | } | |
427 | } | |
428 | ||
429 | return NULL; | |
430 | } | |
431 | ||
432 | static struct tb_tunnel *tb_find_first_usb3_tunnel(struct tb *tb, | |
433 | struct tb_port *src_port, | |
434 | struct tb_port *dst_port) | |
435 | { | |
436 | struct tb_port *port, *usb3_down; | |
437 | struct tb_switch *sw; | |
438 | ||
439 | /* Pick the router that is deepest in the topology */ | |
440 | if (dst_port->sw->config.depth > src_port->sw->config.depth) | |
441 | sw = dst_port->sw; | |
442 | else | |
443 | sw = src_port->sw; | |
444 | ||
445 | /* Can't be the host router */ | |
446 | if (sw == tb->root_switch) | |
447 | return NULL; | |
448 | ||
449 | /* Find the downstream USB4 port that leads to this router */ | |
450 | port = tb_port_at(tb_route(sw), tb->root_switch); | |
451 | /* Find the corresponding host router USB3 downstream port */ | |
452 | usb3_down = usb4_switch_map_usb3_down(tb->root_switch, port); | |
453 | if (!usb3_down) | |
454 | return NULL; | |
455 | ||
456 | return tb_find_tunnel(tb, TB_TUNNEL_USB3, usb3_down, NULL); | |
457 | } | |
458 | ||
459 | static int tb_available_bandwidth(struct tb *tb, struct tb_port *src_port, | |
460 | struct tb_port *dst_port, int *available_up, int *available_down) | |
461 | { | |
462 | int usb3_consumed_up, usb3_consumed_down, ret; | |
463 | struct tb_cm *tcm = tb_priv(tb); | |
464 | struct tb_tunnel *tunnel; | |
465 | struct tb_port *port; | |
466 | ||
2426fdf7 MW |
467 | tb_dbg(tb, "calculating available bandwidth between %llx:%u <-> %llx:%u\n", |
468 | tb_route(src_port->sw), src_port->port, tb_route(dst_port->sw), | |
469 | dst_port->port); | |
0bd680cd MW |
470 | |
471 | tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); | |
6ce35635 MW |
472 | if (tunnel && tunnel->src_port != src_port && |
473 | tunnel->dst_port != dst_port) { | |
0bd680cd MW |
474 | ret = tb_tunnel_consumed_bandwidth(tunnel, &usb3_consumed_up, |
475 | &usb3_consumed_down); | |
476 | if (ret) | |
477 | return ret; | |
478 | } else { | |
479 | usb3_consumed_up = 0; | |
480 | usb3_consumed_down = 0; | |
481 | } | |
482 | ||
483 | *available_up = *available_down = 40000; | |
484 | ||
485 | /* Find the minimum available bandwidth over all links */ | |
486 | tb_for_each_port_on_path(src_port, dst_port, port) { | |
487 | int link_speed, link_width, up_bw, down_bw; | |
488 | ||
489 | if (!tb_port_is_null(port)) | |
490 | continue; | |
491 | ||
492 | if (tb_is_upstream_port(port)) { | |
493 | link_speed = port->sw->link_speed; | |
494 | } else { | |
495 | link_speed = tb_port_get_link_speed(port); | |
496 | if (link_speed < 0) | |
497 | return link_speed; | |
498 | } | |
499 | ||
500 | link_width = port->bonded ? 2 : 1; | |
501 | ||
502 | up_bw = link_speed * link_width * 1000; /* Mb/s */ | |
503 | /* Leave 10% guard band */ | |
504 | up_bw -= up_bw / 10; | |
505 | down_bw = up_bw; | |
506 | ||
2426fdf7 MW |
507 | tb_port_dbg(port, "link total bandwidth %d/%d Mb/s\n", up_bw, |
508 | down_bw); | |
0bd680cd MW |
509 | |
510 | /* | |
511 | * Find all DP tunnels that cross the port and reduce | |
512 | * their consumed bandwidth from the available. | |
513 | */ | |
514 | list_for_each_entry(tunnel, &tcm->tunnel_list, list) { | |
515 | int dp_consumed_up, dp_consumed_down; | |
516 | ||
6ce35635 MW |
517 | if (tb_tunnel_is_invalid(tunnel)) |
518 | continue; | |
519 | ||
0bd680cd MW |
520 | if (!tb_tunnel_is_dp(tunnel)) |
521 | continue; | |
522 | ||
523 | if (!tb_tunnel_port_on_path(tunnel, port)) | |
524 | continue; | |
525 | ||
6ce35635 MW |
526 | /* |
527 | * Ignore the DP tunnel between src_port and | |
528 | * dst_port because it is the same tunnel and we | |
529 | * may be re-calculating estimated bandwidth. | |
530 | */ | |
531 | if (tunnel->src_port == src_port && | |
532 | tunnel->dst_port == dst_port) | |
533 | continue; | |
534 | ||
0bd680cd MW |
535 | ret = tb_tunnel_consumed_bandwidth(tunnel, |
536 | &dp_consumed_up, | |
537 | &dp_consumed_down); | |
538 | if (ret) | |
539 | return ret; | |
540 | ||
541 | up_bw -= dp_consumed_up; | |
542 | down_bw -= dp_consumed_down; | |
543 | } | |
544 | ||
545 | /* | |
546 | * If USB3 is tunneled from the host router down to the | |
547 | * branch leading to port we need to take USB3 consumed | |
548 | * bandwidth into account regardless whether it actually | |
549 | * crosses the port. | |
550 | */ | |
551 | up_bw -= usb3_consumed_up; | |
552 | down_bw -= usb3_consumed_down; | |
553 | ||
554 | if (up_bw < *available_up) | |
555 | *available_up = up_bw; | |
556 | if (down_bw < *available_down) | |
557 | *available_down = down_bw; | |
558 | } | |
559 | ||
560 | if (*available_up < 0) | |
561 | *available_up = 0; | |
562 | if (*available_down < 0) | |
563 | *available_down = 0; | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
568 | static int tb_release_unused_usb3_bandwidth(struct tb *tb, | |
569 | struct tb_port *src_port, | |
570 | struct tb_port *dst_port) | |
571 | { | |
572 | struct tb_tunnel *tunnel; | |
573 | ||
574 | tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); | |
575 | return tunnel ? tb_tunnel_release_unused_bandwidth(tunnel) : 0; | |
576 | } | |
577 | ||
578 | static void tb_reclaim_usb3_bandwidth(struct tb *tb, struct tb_port *src_port, | |
579 | struct tb_port *dst_port) | |
580 | { | |
581 | int ret, available_up, available_down; | |
582 | struct tb_tunnel *tunnel; | |
583 | ||
584 | tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); | |
585 | if (!tunnel) | |
586 | return; | |
587 | ||
588 | tb_dbg(tb, "reclaiming unused bandwidth for USB3\n"); | |
589 | ||
590 | /* | |
591 | * Calculate available bandwidth for the first hop USB3 tunnel. | |
592 | * That determines the whole USB3 bandwidth for this branch. | |
593 | */ | |
594 | ret = tb_available_bandwidth(tb, tunnel->src_port, tunnel->dst_port, | |
595 | &available_up, &available_down); | |
596 | if (ret) { | |
597 | tb_warn(tb, "failed to calculate available bandwidth\n"); | |
598 | return; | |
599 | } | |
600 | ||
601 | tb_dbg(tb, "available bandwidth for USB3 %d/%d Mb/s\n", | |
602 | available_up, available_down); | |
603 | ||
604 | tb_tunnel_reclaim_available_bandwidth(tunnel, &available_up, &available_down); | |
605 | } | |
606 | ||
e6f81858 RM |
607 | static int tb_tunnel_usb3(struct tb *tb, struct tb_switch *sw) |
608 | { | |
609 | struct tb_switch *parent = tb_switch_parent(sw); | |
0bd680cd | 610 | int ret, available_up, available_down; |
e6f81858 RM |
611 | struct tb_port *up, *down, *port; |
612 | struct tb_cm *tcm = tb_priv(tb); | |
613 | struct tb_tunnel *tunnel; | |
614 | ||
c6da62a2 MW |
615 | if (!tb_acpi_may_tunnel_usb3()) { |
616 | tb_dbg(tb, "USB3 tunneling disabled, not creating tunnel\n"); | |
617 | return 0; | |
618 | } | |
619 | ||
e6f81858 RM |
620 | up = tb_switch_find_port(sw, TB_TYPE_USB3_UP); |
621 | if (!up) | |
622 | return 0; | |
623 | ||
bbcf40b3 MW |
624 | if (!sw->link_usb4) |
625 | return 0; | |
626 | ||
e6f81858 RM |
627 | /* |
628 | * Look up available down port. Since we are chaining it should | |
629 | * be found right above this switch. | |
630 | */ | |
631 | port = tb_port_at(tb_route(sw), parent); | |
632 | down = tb_find_usb3_down(parent, port); | |
633 | if (!down) | |
634 | return 0; | |
635 | ||
636 | if (tb_route(parent)) { | |
637 | struct tb_port *parent_up; | |
638 | /* | |
639 | * Check first that the parent switch has its upstream USB3 | |
640 | * port enabled. Otherwise the chain is not complete and | |
641 | * there is no point setting up a new tunnel. | |
642 | */ | |
643 | parent_up = tb_switch_find_port(parent, TB_TYPE_USB3_UP); | |
644 | if (!parent_up || !tb_port_is_enabled(parent_up)) | |
645 | return 0; | |
0bd680cd MW |
646 | |
647 | /* Make all unused bandwidth available for the new tunnel */ | |
648 | ret = tb_release_unused_usb3_bandwidth(tb, down, up); | |
649 | if (ret) | |
650 | return ret; | |
e6f81858 RM |
651 | } |
652 | ||
0bd680cd MW |
653 | ret = tb_available_bandwidth(tb, down, up, &available_up, |
654 | &available_down); | |
655 | if (ret) | |
656 | goto err_reclaim; | |
657 | ||
658 | tb_port_dbg(up, "available bandwidth for new USB3 tunnel %d/%d Mb/s\n", | |
659 | available_up, available_down); | |
660 | ||
661 | tunnel = tb_tunnel_alloc_usb3(tb, up, down, available_up, | |
662 | available_down); | |
663 | if (!tunnel) { | |
664 | ret = -ENOMEM; | |
665 | goto err_reclaim; | |
666 | } | |
e6f81858 RM |
667 | |
668 | if (tb_tunnel_activate(tunnel)) { | |
669 | tb_port_info(up, | |
670 | "USB3 tunnel activation failed, aborting\n"); | |
0bd680cd MW |
671 | ret = -EIO; |
672 | goto err_free; | |
e6f81858 RM |
673 | } |
674 | ||
675 | list_add_tail(&tunnel->list, &tcm->tunnel_list); | |
0bd680cd MW |
676 | if (tb_route(parent)) |
677 | tb_reclaim_usb3_bandwidth(tb, down, up); | |
678 | ||
e6f81858 | 679 | return 0; |
0bd680cd MW |
680 | |
681 | err_free: | |
682 | tb_tunnel_free(tunnel); | |
683 | err_reclaim: | |
684 | if (tb_route(parent)) | |
685 | tb_reclaim_usb3_bandwidth(tb, down, up); | |
686 | ||
687 | return ret; | |
e6f81858 RM |
688 | } |
689 | ||
690 | static int tb_create_usb3_tunnels(struct tb_switch *sw) | |
691 | { | |
692 | struct tb_port *port; | |
693 | int ret; | |
694 | ||
c6da62a2 MW |
695 | if (!tb_acpi_may_tunnel_usb3()) |
696 | return 0; | |
697 | ||
e6f81858 RM |
698 | if (tb_route(sw)) { |
699 | ret = tb_tunnel_usb3(sw->tb, sw); | |
700 | if (ret) | |
701 | return ret; | |
702 | } | |
703 | ||
704 | tb_switch_for_each_port(sw, port) { | |
705 | if (!tb_port_has_remote(port)) | |
706 | continue; | |
707 | ret = tb_create_usb3_tunnels(port->remote->sw); | |
708 | if (ret) | |
709 | return ret; | |
710 | } | |
711 | ||
712 | return 0; | |
713 | } | |
714 | ||
9da672a4 AN |
715 | static void tb_scan_port(struct tb_port *port); |
716 | ||
877e50b3 | 717 | /* |
9da672a4 AN |
718 | * tb_scan_switch() - scan for and initialize downstream switches |
719 | */ | |
720 | static void tb_scan_switch(struct tb_switch *sw) | |
721 | { | |
b433d010 MW |
722 | struct tb_port *port; |
723 | ||
6ac6faee MW |
724 | pm_runtime_get_sync(&sw->dev); |
725 | ||
b433d010 MW |
726 | tb_switch_for_each_port(sw, port) |
727 | tb_scan_port(port); | |
6ac6faee MW |
728 | |
729 | pm_runtime_mark_last_busy(&sw->dev); | |
730 | pm_runtime_put_autosuspend(&sw->dev); | |
9da672a4 AN |
731 | } |
732 | ||
877e50b3 | 733 | /* |
9da672a4 AN |
734 | * tb_scan_port() - check for and initialize switches below port |
735 | */ | |
736 | static void tb_scan_port(struct tb_port *port) | |
737 | { | |
99cabbb0 | 738 | struct tb_cm *tcm = tb_priv(port->sw->tb); |
dfe40ca4 | 739 | struct tb_port *upstream_port; |
9da672a4 | 740 | struct tb_switch *sw; |
990f4b85 | 741 | int ret; |
dfe40ca4 | 742 | |
9da672a4 AN |
743 | if (tb_is_upstream_port(port)) |
744 | return; | |
4f807e47 MW |
745 | |
746 | if (tb_port_is_dpout(port) && tb_dp_port_hpd_is_active(port) == 1 && | |
747 | !tb_dp_port_is_enabled(port)) { | |
748 | tb_port_dbg(port, "DP adapter HPD set, queuing hotplug\n"); | |
749 | tb_queue_hotplug(port->sw->tb, tb_route(port->sw), port->port, | |
750 | false); | |
751 | return; | |
752 | } | |
753 | ||
9da672a4 AN |
754 | if (port->config.type != TB_TYPE_PORT) |
755 | return; | |
343fcb8c AN |
756 | if (port->dual_link_port && port->link_nr) |
757 | return; /* | |
758 | * Downstream switch is reachable through two ports. | |
759 | * Only scan on the primary port (link_nr == 0). | |
760 | */ | |
9da672a4 AN |
761 | if (tb_wait_for_port(port, false) <= 0) |
762 | return; | |
763 | if (port->remote) { | |
7ea4cd6b | 764 | tb_port_dbg(port, "port already has a remote\n"); |
9da672a4 AN |
765 | return; |
766 | } | |
dacb1287 | 767 | |
3fb10ea4 | 768 | tb_retimer_scan(port, true); |
dacb1287 | 769 | |
bfe778ac MW |
770 | sw = tb_switch_alloc(port->sw->tb, &port->sw->dev, |
771 | tb_downstream_route(port)); | |
7ea4cd6b MW |
772 | if (IS_ERR(sw)) { |
773 | /* | |
774 | * If there is an error accessing the connected switch | |
775 | * it may be connected to another domain. Also we allow | |
776 | * the other domain to be connected to a max depth switch. | |
777 | */ | |
778 | if (PTR_ERR(sw) == -EIO || PTR_ERR(sw) == -EADDRNOTAVAIL) | |
779 | tb_scan_xdomain(port); | |
9da672a4 | 780 | return; |
7ea4cd6b | 781 | } |
bfe778ac MW |
782 | |
783 | if (tb_switch_configure(sw)) { | |
784 | tb_switch_put(sw); | |
785 | return; | |
786 | } | |
787 | ||
7ea4cd6b MW |
788 | /* |
789 | * If there was previously another domain connected remove it | |
790 | * first. | |
791 | */ | |
792 | if (port->xdomain) { | |
793 | tb_xdomain_remove(port->xdomain); | |
284652a4 | 794 | tb_port_unconfigure_xdomain(port); |
7ea4cd6b MW |
795 | port->xdomain = NULL; |
796 | } | |
797 | ||
99cabbb0 MW |
798 | /* |
799 | * Do not send uevents until we have discovered all existing | |
800 | * tunnels and know which switches were authorized already by | |
801 | * the boot firmware. | |
802 | */ | |
803 | if (!tcm->hotplug_active) | |
804 | dev_set_uevent_suppress(&sw->dev, true); | |
f67cf491 | 805 | |
6ac6faee MW |
806 | /* |
807 | * At the moment Thunderbolt 2 and beyond (devices with LC) we | |
808 | * can support runtime PM. | |
809 | */ | |
810 | sw->rpm = sw->generation > 1; | |
811 | ||
bfe778ac MW |
812 | if (tb_switch_add(sw)) { |
813 | tb_switch_put(sw); | |
814 | return; | |
815 | } | |
816 | ||
dfe40ca4 MW |
817 | /* Link the switches using both links if available */ |
818 | upstream_port = tb_upstream_port(sw); | |
819 | port->remote = upstream_port; | |
820 | upstream_port->remote = port; | |
821 | if (port->dual_link_port && upstream_port->dual_link_port) { | |
822 | port->dual_link_port->remote = upstream_port->dual_link_port; | |
823 | upstream_port->dual_link_port->remote = port->dual_link_port; | |
824 | } | |
825 | ||
91c0c120 | 826 | /* Enable lane bonding if supported */ |
2ca3263a | 827 | tb_switch_lane_bonding_enable(sw); |
de462039 MW |
828 | /* Set the link configured */ |
829 | tb_switch_configure_link(sw); | |
b017a46d GF |
830 | /* |
831 | * CL0s and CL1 are enabled and supported together. | |
832 | * Silently ignore CLx enabling in case CLx is not supported. | |
833 | */ | |
834 | ret = tb_switch_enable_clx(sw, TB_CL1); | |
990f4b85 | 835 | if (ret && ret != -EOPNOTSUPP) |
b017a46d GF |
836 | tb_sw_warn(sw, "failed to enable %s on upstream port\n", |
837 | tb_switch_clx_name(TB_CL1)); | |
8a90e4fa | 838 | |
b017a46d GF |
839 | if (tb_switch_is_clx_enabled(sw, TB_CL1)) |
840 | /* | |
841 | * To support highest CLx state, we set router's TMU to | |
842 | * Normal-Uni mode. | |
843 | */ | |
844 | tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_NORMAL, true); | |
845 | else | |
846 | /* If CLx disabled, configure router's TMU to HiFi-Bidir mode*/ | |
847 | tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, false); | |
91c0c120 | 848 | |
cf29b9af RM |
849 | if (tb_enable_tmu(sw)) |
850 | tb_sw_warn(sw, "failed to enable TMU\n"); | |
851 | ||
dacb1287 | 852 | /* Scan upstream retimers */ |
3fb10ea4 | 853 | tb_retimer_scan(upstream_port, true); |
dacb1287 | 854 | |
e6f81858 RM |
855 | /* |
856 | * Create USB 3.x tunnels only when the switch is plugged to the | |
857 | * domain. This is because we scan the domain also during discovery | |
858 | * and want to discover existing USB 3.x tunnels before we create | |
859 | * any new. | |
860 | */ | |
861 | if (tcm->hotplug_active && tb_tunnel_usb3(sw->tb, sw)) | |
862 | tb_sw_warn(sw, "USB3 tunnel creation failed\n"); | |
863 | ||
e876f34a | 864 | tb_add_dp_resources(sw); |
9da672a4 AN |
865 | tb_scan_switch(sw); |
866 | } | |
867 | ||
8afe909b MW |
868 | static void tb_deactivate_and_free_tunnel(struct tb_tunnel *tunnel) |
869 | { | |
0bd680cd MW |
870 | struct tb_port *src_port, *dst_port; |
871 | struct tb *tb; | |
872 | ||
8afe909b MW |
873 | if (!tunnel) |
874 | return; | |
875 | ||
876 | tb_tunnel_deactivate(tunnel); | |
877 | list_del(&tunnel->list); | |
878 | ||
0bd680cd MW |
879 | tb = tunnel->tb; |
880 | src_port = tunnel->src_port; | |
881 | dst_port = tunnel->dst_port; | |
882 | ||
883 | switch (tunnel->type) { | |
884 | case TB_TUNNEL_DP: | |
6ce35635 | 885 | tb_detach_bandwidth_group(src_port); |
0bd680cd MW |
886 | /* |
887 | * In case of DP tunnel make sure the DP IN resource is | |
888 | * deallocated properly. | |
889 | */ | |
890 | tb_switch_dealloc_dp_resource(src_port->sw, src_port); | |
6ac6faee MW |
891 | /* Now we can allow the domain to runtime suspend again */ |
892 | pm_runtime_mark_last_busy(&dst_port->sw->dev); | |
893 | pm_runtime_put_autosuspend(&dst_port->sw->dev); | |
894 | pm_runtime_mark_last_busy(&src_port->sw->dev); | |
895 | pm_runtime_put_autosuspend(&src_port->sw->dev); | |
0bd680cd MW |
896 | fallthrough; |
897 | ||
898 | case TB_TUNNEL_USB3: | |
899 | tb_reclaim_usb3_bandwidth(tb, src_port, dst_port); | |
900 | break; | |
8afe909b | 901 | |
0bd680cd MW |
902 | default: |
903 | /* | |
904 | * PCIe and DMA tunnels do not consume guaranteed | |
905 | * bandwidth. | |
906 | */ | |
907 | break; | |
8afe909b MW |
908 | } |
909 | ||
910 | tb_tunnel_free(tunnel); | |
4f807e47 MW |
911 | } |
912 | ||
877e50b3 | 913 | /* |
3364f0c1 AN |
914 | * tb_free_invalid_tunnels() - destroy tunnels of devices that have gone away |
915 | */ | |
916 | static void tb_free_invalid_tunnels(struct tb *tb) | |
917 | { | |
9d3cce0b | 918 | struct tb_cm *tcm = tb_priv(tb); |
93f36ade MW |
919 | struct tb_tunnel *tunnel; |
920 | struct tb_tunnel *n; | |
9d3cce0b MW |
921 | |
922 | list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { | |
8afe909b MW |
923 | if (tb_tunnel_is_invalid(tunnel)) |
924 | tb_deactivate_and_free_tunnel(tunnel); | |
3364f0c1 AN |
925 | } |
926 | } | |
927 | ||
877e50b3 | 928 | /* |
23dd5bb4 AN |
929 | * tb_free_unplugged_children() - traverse hierarchy and free unplugged switches |
930 | */ | |
931 | static void tb_free_unplugged_children(struct tb_switch *sw) | |
932 | { | |
b433d010 | 933 | struct tb_port *port; |
dfe40ca4 | 934 | |
b433d010 | 935 | tb_switch_for_each_port(sw, port) { |
dfe40ca4 | 936 | if (!tb_port_has_remote(port)) |
23dd5bb4 | 937 | continue; |
dfe40ca4 | 938 | |
23dd5bb4 | 939 | if (port->remote->sw->is_unplugged) { |
dacb1287 | 940 | tb_retimer_remove_all(port); |
8afe909b | 941 | tb_remove_dp_resources(port->remote->sw); |
de462039 | 942 | tb_switch_unconfigure_link(port->remote->sw); |
91c0c120 | 943 | tb_switch_lane_bonding_disable(port->remote->sw); |
bfe778ac | 944 | tb_switch_remove(port->remote->sw); |
23dd5bb4 | 945 | port->remote = NULL; |
dfe40ca4 MW |
946 | if (port->dual_link_port) |
947 | port->dual_link_port->remote = NULL; | |
23dd5bb4 AN |
948 | } else { |
949 | tb_free_unplugged_children(port->remote->sw); | |
950 | } | |
951 | } | |
952 | } | |
953 | ||
99cabbb0 MW |
954 | static struct tb_port *tb_find_pcie_down(struct tb_switch *sw, |
955 | const struct tb_port *port) | |
3364f0c1 | 956 | { |
b0407983 MW |
957 | struct tb_port *down = NULL; |
958 | ||
99cabbb0 MW |
959 | /* |
960 | * To keep plugging devices consistently in the same PCIe | |
b0407983 | 961 | * hierarchy, do mapping here for switch downstream PCIe ports. |
99cabbb0 | 962 | */ |
b0407983 MW |
963 | if (tb_switch_is_usb4(sw)) { |
964 | down = usb4_switch_map_pcie_down(sw, port); | |
965 | } else if (!tb_route(sw)) { | |
99cabbb0 MW |
966 | int phy_port = tb_phy_port_from_link(port->port); |
967 | int index; | |
9d3cce0b | 968 | |
99cabbb0 MW |
969 | /* |
970 | * Hard-coded Thunderbolt port to PCIe down port mapping | |
971 | * per controller. | |
972 | */ | |
7bffd97e MW |
973 | if (tb_switch_is_cactus_ridge(sw) || |
974 | tb_switch_is_alpine_ridge(sw)) | |
99cabbb0 | 975 | index = !phy_port ? 6 : 7; |
17a8f815 | 976 | else if (tb_switch_is_falcon_ridge(sw)) |
99cabbb0 | 977 | index = !phy_port ? 6 : 8; |
7bffd97e MW |
978 | else if (tb_switch_is_titan_ridge(sw)) |
979 | index = !phy_port ? 8 : 9; | |
99cabbb0 MW |
980 | else |
981 | goto out; | |
982 | ||
983 | /* Validate the hard-coding */ | |
984 | if (WARN_ON(index > sw->config.max_port_number)) | |
985 | goto out; | |
b0407983 MW |
986 | |
987 | down = &sw->ports[index]; | |
988 | } | |
989 | ||
990 | if (down) { | |
991 | if (WARN_ON(!tb_port_is_pcie_down(down))) | |
99cabbb0 | 992 | goto out; |
9cac51a0 | 993 | if (tb_pci_port_is_enabled(down)) |
99cabbb0 MW |
994 | goto out; |
995 | ||
b0407983 | 996 | return down; |
99cabbb0 | 997 | } |
3364f0c1 | 998 | |
99cabbb0 | 999 | out: |
e78db6f0 | 1000 | return tb_find_unused_port(sw, TB_TYPE_PCIE_DOWN); |
99cabbb0 | 1001 | } |
3364f0c1 | 1002 | |
6ce35635 MW |
1003 | static void |
1004 | tb_recalc_estimated_bandwidth_for_group(struct tb_bandwidth_group *group) | |
1005 | { | |
1006 | struct tb_tunnel *first_tunnel; | |
1007 | struct tb *tb = group->tb; | |
1008 | struct tb_port *in; | |
1009 | int ret; | |
1010 | ||
1011 | tb_dbg(tb, "re-calculating bandwidth estimation for group %u\n", | |
1012 | group->index); | |
1013 | ||
1014 | first_tunnel = NULL; | |
1015 | list_for_each_entry(in, &group->ports, group_list) { | |
1016 | int estimated_bw, estimated_up, estimated_down; | |
1017 | struct tb_tunnel *tunnel; | |
1018 | struct tb_port *out; | |
1019 | ||
1020 | if (!usb4_dp_port_bw_mode_enabled(in)) | |
1021 | continue; | |
1022 | ||
1023 | tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL); | |
1024 | if (WARN_ON(!tunnel)) | |
1025 | break; | |
1026 | ||
1027 | if (!first_tunnel) { | |
1028 | /* | |
1029 | * Since USB3 bandwidth is shared by all DP | |
1030 | * tunnels under the host router USB4 port, even | |
1031 | * if they do not begin from the host router, we | |
1032 | * can release USB3 bandwidth just once and not | |
1033 | * for each tunnel separately. | |
1034 | */ | |
1035 | first_tunnel = tunnel; | |
1036 | ret = tb_release_unused_usb3_bandwidth(tb, | |
1037 | first_tunnel->src_port, first_tunnel->dst_port); | |
1038 | if (ret) { | |
1039 | tb_port_warn(in, | |
1040 | "failed to release unused bandwidth\n"); | |
1041 | break; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | out = tunnel->dst_port; | |
1046 | ret = tb_available_bandwidth(tb, in, out, &estimated_up, | |
1047 | &estimated_down); | |
1048 | if (ret) { | |
1049 | tb_port_warn(in, | |
1050 | "failed to re-calculate estimated bandwidth\n"); | |
1051 | break; | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * Estimated bandwidth includes: | |
1056 | * - already allocated bandwidth for the DP tunnel | |
1057 | * - available bandwidth along the path | |
1058 | * - bandwidth allocated for USB 3.x but not used. | |
1059 | */ | |
1060 | tb_port_dbg(in, "re-calculated estimated bandwidth %u/%u Mb/s\n", | |
1061 | estimated_up, estimated_down); | |
1062 | ||
1063 | if (in->sw->config.depth < out->sw->config.depth) | |
1064 | estimated_bw = estimated_down; | |
1065 | else | |
1066 | estimated_bw = estimated_up; | |
1067 | ||
1068 | if (usb4_dp_port_set_estimated_bw(in, estimated_bw)) | |
1069 | tb_port_warn(in, "failed to update estimated bandwidth\n"); | |
1070 | } | |
1071 | ||
1072 | if (first_tunnel) | |
1073 | tb_reclaim_usb3_bandwidth(tb, first_tunnel->src_port, | |
1074 | first_tunnel->dst_port); | |
1075 | ||
1076 | tb_dbg(tb, "bandwidth estimation for group %u done\n", group->index); | |
1077 | } | |
1078 | ||
1079 | static void tb_recalc_estimated_bandwidth(struct tb *tb) | |
1080 | { | |
1081 | struct tb_cm *tcm = tb_priv(tb); | |
1082 | int i; | |
1083 | ||
1084 | tb_dbg(tb, "bandwidth consumption changed, re-calculating estimated bandwidth\n"); | |
1085 | ||
1086 | for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { | |
1087 | struct tb_bandwidth_group *group = &tcm->groups[i]; | |
1088 | ||
1089 | if (!list_empty(&group->ports)) | |
1090 | tb_recalc_estimated_bandwidth_for_group(group); | |
1091 | } | |
1092 | ||
1093 | tb_dbg(tb, "bandwidth re-calculation done\n"); | |
1094 | } | |
1095 | ||
e876f34a MW |
1096 | static struct tb_port *tb_find_dp_out(struct tb *tb, struct tb_port *in) |
1097 | { | |
1098 | struct tb_port *host_port, *port; | |
1099 | struct tb_cm *tcm = tb_priv(tb); | |
1100 | ||
1101 | host_port = tb_route(in->sw) ? | |
1102 | tb_port_at(tb_route(in->sw), tb->root_switch) : NULL; | |
1103 | ||
1104 | list_for_each_entry(port, &tcm->dp_resources, list) { | |
1105 | if (!tb_port_is_dpout(port)) | |
1106 | continue; | |
1107 | ||
1108 | if (tb_port_is_enabled(port)) { | |
b0ef48fc | 1109 | tb_port_dbg(port, "DP OUT in use\n"); |
e876f34a MW |
1110 | continue; |
1111 | } | |
1112 | ||
1113 | tb_port_dbg(port, "DP OUT available\n"); | |
1114 | ||
1115 | /* | |
1116 | * Keep the DP tunnel under the topology starting from | |
1117 | * the same host router downstream port. | |
1118 | */ | |
1119 | if (host_port && tb_route(port->sw)) { | |
1120 | struct tb_port *p; | |
1121 | ||
1122 | p = tb_port_at(tb_route(port->sw), tb->root_switch); | |
1123 | if (p != host_port) | |
1124 | continue; | |
1125 | } | |
1126 | ||
1127 | return port; | |
1128 | } | |
1129 | ||
1130 | return NULL; | |
1131 | } | |
1132 | ||
8afe909b | 1133 | static void tb_tunnel_dp(struct tb *tb) |
4f807e47 | 1134 | { |
9d2d0a5c | 1135 | int available_up, available_down, ret, link_nr; |
4f807e47 | 1136 | struct tb_cm *tcm = tb_priv(tb); |
8afe909b | 1137 | struct tb_port *port, *in, *out; |
4f807e47 | 1138 | struct tb_tunnel *tunnel; |
4f807e47 | 1139 | |
c6da62a2 MW |
1140 | if (!tb_acpi_may_tunnel_dp()) { |
1141 | tb_dbg(tb, "DP tunneling disabled, not creating tunnel\n"); | |
1142 | return; | |
1143 | } | |
1144 | ||
8afe909b MW |
1145 | /* |
1146 | * Find pair of inactive DP IN and DP OUT adapters and then | |
1147 | * establish a DP tunnel between them. | |
1148 | */ | |
1149 | tb_dbg(tb, "looking for DP IN <-> DP OUT pairs:\n"); | |
1150 | ||
1151 | in = NULL; | |
1152 | out = NULL; | |
1153 | list_for_each_entry(port, &tcm->dp_resources, list) { | |
e876f34a MW |
1154 | if (!tb_port_is_dpin(port)) |
1155 | continue; | |
1156 | ||
8afe909b | 1157 | if (tb_port_is_enabled(port)) { |
b0ef48fc | 1158 | tb_port_dbg(port, "DP IN in use\n"); |
8afe909b MW |
1159 | continue; |
1160 | } | |
4f807e47 | 1161 | |
e876f34a | 1162 | tb_port_dbg(port, "DP IN available\n"); |
8afe909b | 1163 | |
e876f34a MW |
1164 | out = tb_find_dp_out(tb, port); |
1165 | if (out) { | |
8afe909b | 1166 | in = port; |
e876f34a MW |
1167 | break; |
1168 | } | |
8afe909b MW |
1169 | } |
1170 | ||
1171 | if (!in) { | |
1172 | tb_dbg(tb, "no suitable DP IN adapter available, not tunneling\n"); | |
1173 | return; | |
1174 | } | |
1175 | if (!out) { | |
1176 | tb_dbg(tb, "no suitable DP OUT adapter available, not tunneling\n"); | |
1177 | return; | |
1178 | } | |
1179 | ||
9d2d0a5c MW |
1180 | /* |
1181 | * This is only applicable to links that are not bonded (so | |
1182 | * when Thunderbolt 1 hardware is involved somewhere in the | |
1183 | * topology). For these try to share the DP bandwidth between | |
1184 | * the two lanes. | |
1185 | */ | |
1186 | link_nr = 1; | |
1187 | list_for_each_entry(tunnel, &tcm->tunnel_list, list) { | |
1188 | if (tb_tunnel_is_dp(tunnel)) { | |
1189 | link_nr = 0; | |
1190 | break; | |
1191 | } | |
1192 | } | |
1193 | ||
6ac6faee MW |
1194 | /* |
1195 | * DP stream needs the domain to be active so runtime resume | |
1196 | * both ends of the tunnel. | |
1197 | * | |
1198 | * This should bring the routers in the middle active as well | |
1199 | * and keeps the domain from runtime suspending while the DP | |
1200 | * tunnel is active. | |
1201 | */ | |
1202 | pm_runtime_get_sync(&in->sw->dev); | |
1203 | pm_runtime_get_sync(&out->sw->dev); | |
1204 | ||
8afe909b MW |
1205 | if (tb_switch_alloc_dp_resource(in->sw, in)) { |
1206 | tb_port_dbg(in, "no resource available for DP IN, not tunneling\n"); | |
6ac6faee | 1207 | goto err_rpm_put; |
8afe909b | 1208 | } |
4f807e47 | 1209 | |
6ce35635 MW |
1210 | if (!tb_attach_bandwidth_group(tcm, in, out)) |
1211 | goto err_dealloc_dp; | |
1212 | ||
0bd680cd MW |
1213 | /* Make all unused USB3 bandwidth available for the new DP tunnel */ |
1214 | ret = tb_release_unused_usb3_bandwidth(tb, in, out); | |
1215 | if (ret) { | |
1216 | tb_warn(tb, "failed to release unused bandwidth\n"); | |
6ce35635 | 1217 | goto err_detach_group; |
a11b88ad MW |
1218 | } |
1219 | ||
6ce35635 | 1220 | ret = tb_available_bandwidth(tb, in, out, &available_up, &available_down); |
0bd680cd | 1221 | if (ret) |
6ce35635 | 1222 | goto err_reclaim_usb; |
0bd680cd MW |
1223 | |
1224 | tb_dbg(tb, "available bandwidth for new DP tunnel %u/%u Mb/s\n", | |
1225 | available_up, available_down); | |
a11b88ad | 1226 | |
9d2d0a5c MW |
1227 | tunnel = tb_tunnel_alloc_dp(tb, in, out, link_nr, available_up, |
1228 | available_down); | |
4f807e47 | 1229 | if (!tunnel) { |
8afe909b | 1230 | tb_port_dbg(out, "could not allocate DP tunnel\n"); |
6ce35635 | 1231 | goto err_reclaim_usb; |
4f807e47 MW |
1232 | } |
1233 | ||
1234 | if (tb_tunnel_activate(tunnel)) { | |
1235 | tb_port_info(out, "DP tunnel activation failed, aborting\n"); | |
0bd680cd | 1236 | goto err_free; |
4f807e47 MW |
1237 | } |
1238 | ||
1239 | list_add_tail(&tunnel->list, &tcm->tunnel_list); | |
0bd680cd | 1240 | tb_reclaim_usb3_bandwidth(tb, in, out); |
6ce35635 MW |
1241 | |
1242 | /* Update the domain with the new bandwidth estimation */ | |
1243 | tb_recalc_estimated_bandwidth(tb); | |
1244 | ||
3084b48f GF |
1245 | /* |
1246 | * In case of DP tunnel exists, change host router's 1st children | |
1247 | * TMU mode to HiFi for CL0s to work. | |
1248 | */ | |
1249 | tb_switch_enable_tmu_1st_child(tb->root_switch, TB_SWITCH_TMU_RATE_HIFI); | |
1250 | ||
8afe909b MW |
1251 | return; |
1252 | ||
0bd680cd MW |
1253 | err_free: |
1254 | tb_tunnel_free(tunnel); | |
6ce35635 | 1255 | err_reclaim_usb: |
0bd680cd | 1256 | tb_reclaim_usb3_bandwidth(tb, in, out); |
6ce35635 MW |
1257 | err_detach_group: |
1258 | tb_detach_bandwidth_group(in); | |
0bd680cd | 1259 | err_dealloc_dp: |
8afe909b | 1260 | tb_switch_dealloc_dp_resource(in->sw, in); |
6ac6faee MW |
1261 | err_rpm_put: |
1262 | pm_runtime_mark_last_busy(&out->sw->dev); | |
1263 | pm_runtime_put_autosuspend(&out->sw->dev); | |
1264 | pm_runtime_mark_last_busy(&in->sw->dev); | |
1265 | pm_runtime_put_autosuspend(&in->sw->dev); | |
4f807e47 MW |
1266 | } |
1267 | ||
8afe909b | 1268 | static void tb_dp_resource_unavailable(struct tb *tb, struct tb_port *port) |
4f807e47 | 1269 | { |
8afe909b MW |
1270 | struct tb_port *in, *out; |
1271 | struct tb_tunnel *tunnel; | |
1272 | ||
1273 | if (tb_port_is_dpin(port)) { | |
1274 | tb_port_dbg(port, "DP IN resource unavailable\n"); | |
1275 | in = port; | |
1276 | out = NULL; | |
1277 | } else { | |
1278 | tb_port_dbg(port, "DP OUT resource unavailable\n"); | |
1279 | in = NULL; | |
1280 | out = port; | |
1281 | } | |
1282 | ||
1283 | tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, out); | |
1284 | tb_deactivate_and_free_tunnel(tunnel); | |
1285 | list_del_init(&port->list); | |
1286 | ||
1287 | /* | |
1288 | * See if there is another DP OUT port that can be used for | |
1289 | * to create another tunnel. | |
1290 | */ | |
6ce35635 | 1291 | tb_recalc_estimated_bandwidth(tb); |
8afe909b MW |
1292 | tb_tunnel_dp(tb); |
1293 | } | |
1294 | ||
1295 | static void tb_dp_resource_available(struct tb *tb, struct tb_port *port) | |
1296 | { | |
1297 | struct tb_cm *tcm = tb_priv(tb); | |
1298 | struct tb_port *p; | |
1299 | ||
1300 | if (tb_port_is_enabled(port)) | |
1301 | return; | |
1302 | ||
1303 | list_for_each_entry(p, &tcm->dp_resources, list) { | |
1304 | if (p == port) | |
1305 | return; | |
1306 | } | |
1307 | ||
1308 | tb_port_dbg(port, "DP %s resource available\n", | |
1309 | tb_port_is_dpin(port) ? "IN" : "OUT"); | |
1310 | list_add_tail(&port->list, &tcm->dp_resources); | |
1311 | ||
1312 | /* Look for suitable DP IN <-> DP OUT pairs now */ | |
1313 | tb_tunnel_dp(tb); | |
4f807e47 MW |
1314 | } |
1315 | ||
81a2e3e4 MW |
1316 | static void tb_disconnect_and_release_dp(struct tb *tb) |
1317 | { | |
1318 | struct tb_cm *tcm = tb_priv(tb); | |
1319 | struct tb_tunnel *tunnel, *n; | |
1320 | ||
1321 | /* | |
1322 | * Tear down all DP tunnels and release their resources. They | |
1323 | * will be re-established after resume based on plug events. | |
1324 | */ | |
1325 | list_for_each_entry_safe_reverse(tunnel, n, &tcm->tunnel_list, list) { | |
1326 | if (tb_tunnel_is_dp(tunnel)) | |
1327 | tb_deactivate_and_free_tunnel(tunnel); | |
1328 | } | |
1329 | ||
1330 | while (!list_empty(&tcm->dp_resources)) { | |
1331 | struct tb_port *port; | |
1332 | ||
1333 | port = list_first_entry(&tcm->dp_resources, | |
1334 | struct tb_port, list); | |
1335 | list_del_init(&port->list); | |
1336 | } | |
1337 | } | |
1338 | ||
3da88be2 MW |
1339 | static int tb_disconnect_pci(struct tb *tb, struct tb_switch *sw) |
1340 | { | |
1341 | struct tb_tunnel *tunnel; | |
1342 | struct tb_port *up; | |
1343 | ||
1344 | up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP); | |
1345 | if (WARN_ON(!up)) | |
1346 | return -ENODEV; | |
1347 | ||
1348 | tunnel = tb_find_tunnel(tb, TB_TUNNEL_PCI, NULL, up); | |
1349 | if (WARN_ON(!tunnel)) | |
1350 | return -ENODEV; | |
1351 | ||
30a4eca6 MW |
1352 | tb_switch_xhci_disconnect(sw); |
1353 | ||
3da88be2 MW |
1354 | tb_tunnel_deactivate(tunnel); |
1355 | list_del(&tunnel->list); | |
1356 | tb_tunnel_free(tunnel); | |
1357 | return 0; | |
1358 | } | |
1359 | ||
99cabbb0 MW |
1360 | static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw) |
1361 | { | |
1362 | struct tb_port *up, *down, *port; | |
1363 | struct tb_cm *tcm = tb_priv(tb); | |
1364 | struct tb_switch *parent_sw; | |
1365 | struct tb_tunnel *tunnel; | |
3364f0c1 | 1366 | |
386e5e29 | 1367 | up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP); |
99cabbb0 MW |
1368 | if (!up) |
1369 | return 0; | |
3364f0c1 | 1370 | |
99cabbb0 MW |
1371 | /* |
1372 | * Look up available down port. Since we are chaining it should | |
1373 | * be found right above this switch. | |
1374 | */ | |
1375 | parent_sw = tb_to_switch(sw->dev.parent); | |
1376 | port = tb_port_at(tb_route(sw), parent_sw); | |
1377 | down = tb_find_pcie_down(parent_sw, port); | |
1378 | if (!down) | |
1379 | return 0; | |
1380 | ||
1381 | tunnel = tb_tunnel_alloc_pci(tb, up, down); | |
1382 | if (!tunnel) | |
1383 | return -ENOMEM; | |
1384 | ||
1385 | if (tb_tunnel_activate(tunnel)) { | |
1386 | tb_port_info(up, | |
1387 | "PCIe tunnel activation failed, aborting\n"); | |
1388 | tb_tunnel_free(tunnel); | |
1389 | return -EIO; | |
3364f0c1 | 1390 | } |
99cabbb0 | 1391 | |
43f977bc GF |
1392 | /* |
1393 | * PCIe L1 is needed to enable CL0s for Titan Ridge so enable it | |
1394 | * here. | |
1395 | */ | |
1396 | if (tb_switch_pcie_l1_enable(sw)) | |
1397 | tb_sw_warn(sw, "failed to enable PCIe L1 for Titan Ridge\n"); | |
1398 | ||
30a4eca6 MW |
1399 | if (tb_switch_xhci_connect(sw)) |
1400 | tb_sw_warn(sw, "failed to connect xHCI\n"); | |
1401 | ||
99cabbb0 MW |
1402 | list_add_tail(&tunnel->list, &tcm->tunnel_list); |
1403 | return 0; | |
3364f0c1 | 1404 | } |
9da672a4 | 1405 | |
180b0689 MW |
1406 | static int tb_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, |
1407 | int transmit_path, int transmit_ring, | |
1408 | int receive_path, int receive_ring) | |
7ea4cd6b MW |
1409 | { |
1410 | struct tb_cm *tcm = tb_priv(tb); | |
1411 | struct tb_port *nhi_port, *dst_port; | |
1412 | struct tb_tunnel *tunnel; | |
1413 | struct tb_switch *sw; | |
1414 | ||
1415 | sw = tb_to_switch(xd->dev.parent); | |
1416 | dst_port = tb_port_at(xd->route, sw); | |
386e5e29 | 1417 | nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); |
7ea4cd6b MW |
1418 | |
1419 | mutex_lock(&tb->lock); | |
180b0689 MW |
1420 | tunnel = tb_tunnel_alloc_dma(tb, nhi_port, dst_port, transmit_path, |
1421 | transmit_ring, receive_path, receive_ring); | |
7ea4cd6b MW |
1422 | if (!tunnel) { |
1423 | mutex_unlock(&tb->lock); | |
1424 | return -ENOMEM; | |
1425 | } | |
1426 | ||
1427 | if (tb_tunnel_activate(tunnel)) { | |
1428 | tb_port_info(nhi_port, | |
1429 | "DMA tunnel activation failed, aborting\n"); | |
1430 | tb_tunnel_free(tunnel); | |
1431 | mutex_unlock(&tb->lock); | |
1432 | return -EIO; | |
1433 | } | |
1434 | ||
1435 | list_add_tail(&tunnel->list, &tcm->tunnel_list); | |
1436 | mutex_unlock(&tb->lock); | |
1437 | return 0; | |
1438 | } | |
1439 | ||
180b0689 MW |
1440 | static void __tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, |
1441 | int transmit_path, int transmit_ring, | |
1442 | int receive_path, int receive_ring) | |
7ea4cd6b | 1443 | { |
180b0689 MW |
1444 | struct tb_cm *tcm = tb_priv(tb); |
1445 | struct tb_port *nhi_port, *dst_port; | |
1446 | struct tb_tunnel *tunnel, *n; | |
7ea4cd6b MW |
1447 | struct tb_switch *sw; |
1448 | ||
1449 | sw = tb_to_switch(xd->dev.parent); | |
1450 | dst_port = tb_port_at(xd->route, sw); | |
180b0689 | 1451 | nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); |
7ea4cd6b | 1452 | |
180b0689 MW |
1453 | list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { |
1454 | if (!tb_tunnel_is_dma(tunnel)) | |
1455 | continue; | |
1456 | if (tunnel->src_port != nhi_port || tunnel->dst_port != dst_port) | |
1457 | continue; | |
1458 | ||
1459 | if (tb_tunnel_match_dma(tunnel, transmit_path, transmit_ring, | |
1460 | receive_path, receive_ring)) | |
1461 | tb_deactivate_and_free_tunnel(tunnel); | |
1462 | } | |
7ea4cd6b MW |
1463 | } |
1464 | ||
180b0689 MW |
1465 | static int tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, |
1466 | int transmit_path, int transmit_ring, | |
1467 | int receive_path, int receive_ring) | |
7ea4cd6b MW |
1468 | { |
1469 | if (!xd->is_unplugged) { | |
1470 | mutex_lock(&tb->lock); | |
180b0689 MW |
1471 | __tb_disconnect_xdomain_paths(tb, xd, transmit_path, |
1472 | transmit_ring, receive_path, | |
1473 | receive_ring); | |
7ea4cd6b MW |
1474 | mutex_unlock(&tb->lock); |
1475 | } | |
1476 | return 0; | |
1477 | } | |
1478 | ||
d6cc51cd AN |
1479 | /* hotplug handling */ |
1480 | ||
877e50b3 | 1481 | /* |
d6cc51cd AN |
1482 | * tb_handle_hotplug() - handle hotplug event |
1483 | * | |
1484 | * Executes on tb->wq. | |
1485 | */ | |
1486 | static void tb_handle_hotplug(struct work_struct *work) | |
1487 | { | |
1488 | struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); | |
1489 | struct tb *tb = ev->tb; | |
9d3cce0b | 1490 | struct tb_cm *tcm = tb_priv(tb); |
053596d9 AN |
1491 | struct tb_switch *sw; |
1492 | struct tb_port *port; | |
284652a4 | 1493 | |
6ac6faee MW |
1494 | /* Bring the domain back from sleep if it was suspended */ |
1495 | pm_runtime_get_sync(&tb->dev); | |
1496 | ||
d6cc51cd | 1497 | mutex_lock(&tb->lock); |
9d3cce0b | 1498 | if (!tcm->hotplug_active) |
d6cc51cd AN |
1499 | goto out; /* during init, suspend or shutdown */ |
1500 | ||
8f965efd | 1501 | sw = tb_switch_find_by_route(tb, ev->route); |
053596d9 AN |
1502 | if (!sw) { |
1503 | tb_warn(tb, | |
1504 | "hotplug event from non existent switch %llx:%x (unplug: %d)\n", | |
1505 | ev->route, ev->port, ev->unplug); | |
1506 | goto out; | |
1507 | } | |
1508 | if (ev->port > sw->config.max_port_number) { | |
1509 | tb_warn(tb, | |
1510 | "hotplug event from non existent port %llx:%x (unplug: %d)\n", | |
1511 | ev->route, ev->port, ev->unplug); | |
8f965efd | 1512 | goto put_sw; |
053596d9 AN |
1513 | } |
1514 | port = &sw->ports[ev->port]; | |
1515 | if (tb_is_upstream_port(port)) { | |
dfe40ca4 MW |
1516 | tb_dbg(tb, "hotplug event for upstream port %llx:%x (unplug: %d)\n", |
1517 | ev->route, ev->port, ev->unplug); | |
8f965efd | 1518 | goto put_sw; |
053596d9 | 1519 | } |
6ac6faee MW |
1520 | |
1521 | pm_runtime_get_sync(&sw->dev); | |
1522 | ||
053596d9 | 1523 | if (ev->unplug) { |
dacb1287 KK |
1524 | tb_retimer_remove_all(port); |
1525 | ||
dfe40ca4 | 1526 | if (tb_port_has_remote(port)) { |
7ea4cd6b | 1527 | tb_port_dbg(port, "switch unplugged\n"); |
aae20bb6 | 1528 | tb_sw_set_unplugged(port->remote->sw); |
3364f0c1 | 1529 | tb_free_invalid_tunnels(tb); |
8afe909b | 1530 | tb_remove_dp_resources(port->remote->sw); |
cf29b9af | 1531 | tb_switch_tmu_disable(port->remote->sw); |
de462039 | 1532 | tb_switch_unconfigure_link(port->remote->sw); |
91c0c120 | 1533 | tb_switch_lane_bonding_disable(port->remote->sw); |
bfe778ac | 1534 | tb_switch_remove(port->remote->sw); |
053596d9 | 1535 | port->remote = NULL; |
dfe40ca4 MW |
1536 | if (port->dual_link_port) |
1537 | port->dual_link_port->remote = NULL; | |
8afe909b | 1538 | /* Maybe we can create another DP tunnel */ |
6ce35635 | 1539 | tb_recalc_estimated_bandwidth(tb); |
8afe909b | 1540 | tb_tunnel_dp(tb); |
7ea4cd6b MW |
1541 | } else if (port->xdomain) { |
1542 | struct tb_xdomain *xd = tb_xdomain_get(port->xdomain); | |
1543 | ||
1544 | tb_port_dbg(port, "xdomain unplugged\n"); | |
1545 | /* | |
1546 | * Service drivers are unbound during | |
1547 | * tb_xdomain_remove() so setting XDomain as | |
1548 | * unplugged here prevents deadlock if they call | |
1549 | * tb_xdomain_disable_paths(). We will tear down | |
180b0689 | 1550 | * all the tunnels below. |
7ea4cd6b MW |
1551 | */ |
1552 | xd->is_unplugged = true; | |
1553 | tb_xdomain_remove(xd); | |
1554 | port->xdomain = NULL; | |
180b0689 | 1555 | __tb_disconnect_xdomain_paths(tb, xd, -1, -1, -1, -1); |
7ea4cd6b | 1556 | tb_xdomain_put(xd); |
284652a4 | 1557 | tb_port_unconfigure_xdomain(port); |
8afe909b MW |
1558 | } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { |
1559 | tb_dp_resource_unavailable(tb, port); | |
30a4eca6 MW |
1560 | } else if (!port->port) { |
1561 | tb_sw_dbg(sw, "xHCI disconnect request\n"); | |
1562 | tb_switch_xhci_disconnect(sw); | |
053596d9 | 1563 | } else { |
62efe699 MW |
1564 | tb_port_dbg(port, |
1565 | "got unplug event for disconnected port, ignoring\n"); | |
053596d9 AN |
1566 | } |
1567 | } else if (port->remote) { | |
62efe699 | 1568 | tb_port_dbg(port, "got plug event for connected port, ignoring\n"); |
30a4eca6 MW |
1569 | } else if (!port->port && sw->authorized) { |
1570 | tb_sw_dbg(sw, "xHCI connect request\n"); | |
1571 | tb_switch_xhci_connect(sw); | |
053596d9 | 1572 | } else { |
344e0643 | 1573 | if (tb_port_is_null(port)) { |
62efe699 | 1574 | tb_port_dbg(port, "hotplug: scanning\n"); |
344e0643 MW |
1575 | tb_scan_port(port); |
1576 | if (!port->remote) | |
62efe699 | 1577 | tb_port_dbg(port, "hotplug: no switch found\n"); |
8afe909b MW |
1578 | } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { |
1579 | tb_dp_resource_available(tb, port); | |
344e0643 | 1580 | } |
053596d9 | 1581 | } |
8f965efd | 1582 | |
6ac6faee MW |
1583 | pm_runtime_mark_last_busy(&sw->dev); |
1584 | pm_runtime_put_autosuspend(&sw->dev); | |
1585 | ||
8f965efd MW |
1586 | put_sw: |
1587 | tb_switch_put(sw); | |
d6cc51cd AN |
1588 | out: |
1589 | mutex_unlock(&tb->lock); | |
6ac6faee MW |
1590 | |
1591 | pm_runtime_mark_last_busy(&tb->dev); | |
1592 | pm_runtime_put_autosuspend(&tb->dev); | |
1593 | ||
d6cc51cd AN |
1594 | kfree(ev); |
1595 | } | |
1596 | ||
6ce35635 MW |
1597 | static int tb_alloc_dp_bandwidth(struct tb_tunnel *tunnel, int *requested_up, |
1598 | int *requested_down) | |
1599 | { | |
1600 | int allocated_up, allocated_down, available_up, available_down, ret; | |
1601 | int requested_up_corrected, requested_down_corrected, granularity; | |
1602 | int max_up, max_down, max_up_rounded, max_down_rounded; | |
1603 | struct tb *tb = tunnel->tb; | |
1604 | struct tb_port *in, *out; | |
1605 | ||
1606 | ret = tb_tunnel_allocated_bandwidth(tunnel, &allocated_up, &allocated_down); | |
1607 | if (ret) | |
1608 | return ret; | |
1609 | ||
1610 | in = tunnel->src_port; | |
1611 | out = tunnel->dst_port; | |
1612 | ||
1613 | tb_port_dbg(in, "bandwidth allocated currently %d/%d Mb/s\n", | |
1614 | allocated_up, allocated_down); | |
1615 | ||
1616 | /* | |
1617 | * If we get rounded up request from graphics side, say HBR2 x 4 | |
1618 | * that is 17500 instead of 17280 (this is because of the | |
1619 | * granularity), we allow it too. Here the graphics has already | |
1620 | * negotiated with the DPRX the maximum possible rates (which is | |
1621 | * 17280 in this case). | |
1622 | * | |
1623 | * Since the link cannot go higher than 17280 we use that in our | |
1624 | * calculations but the DP IN adapter Allocated BW write must be | |
1625 | * the same value (17500) otherwise the adapter will mark it as | |
1626 | * failed for graphics. | |
1627 | */ | |
1628 | ret = tb_tunnel_maximum_bandwidth(tunnel, &max_up, &max_down); | |
1629 | if (ret) | |
1630 | return ret; | |
1631 | ||
1632 | ret = usb4_dp_port_granularity(in); | |
1633 | if (ret < 0) | |
1634 | return ret; | |
1635 | granularity = ret; | |
1636 | ||
1637 | max_up_rounded = roundup(max_up, granularity); | |
1638 | max_down_rounded = roundup(max_down, granularity); | |
1639 | ||
1640 | /* | |
1641 | * This will "fix" the request down to the maximum supported | |
1642 | * rate * lanes if it is at the maximum rounded up level. | |
1643 | */ | |
1644 | requested_up_corrected = *requested_up; | |
1645 | if (requested_up_corrected == max_up_rounded) | |
1646 | requested_up_corrected = max_up; | |
1647 | else if (requested_up_corrected < 0) | |
1648 | requested_up_corrected = 0; | |
1649 | requested_down_corrected = *requested_down; | |
1650 | if (requested_down_corrected == max_down_rounded) | |
1651 | requested_down_corrected = max_down; | |
1652 | else if (requested_down_corrected < 0) | |
1653 | requested_down_corrected = 0; | |
1654 | ||
1655 | tb_port_dbg(in, "corrected bandwidth request %d/%d Mb/s\n", | |
1656 | requested_up_corrected, requested_down_corrected); | |
1657 | ||
1658 | if ((*requested_up >= 0 && requested_up_corrected > max_up_rounded) || | |
1659 | (*requested_down >= 0 && requested_down_corrected > max_down_rounded)) { | |
1660 | tb_port_dbg(in, "bandwidth request too high (%d/%d Mb/s > %d/%d Mb/s)\n", | |
1661 | requested_up_corrected, requested_down_corrected, | |
1662 | max_up_rounded, max_down_rounded); | |
1663 | return -ENOBUFS; | |
1664 | } | |
1665 | ||
1666 | if ((*requested_up >= 0 && requested_up_corrected <= allocated_up) || | |
1667 | (*requested_down >= 0 && requested_down_corrected <= allocated_down)) { | |
1668 | /* | |
1669 | * If requested bandwidth is less or equal than what is | |
1670 | * currently allocated to that tunnel we simply change | |
1671 | * the reservation of the tunnel. Since all the tunnels | |
1672 | * going out from the same USB4 port are in the same | |
1673 | * group the released bandwidth will be taken into | |
1674 | * account for the other tunnels automatically below. | |
1675 | */ | |
1676 | return tb_tunnel_alloc_bandwidth(tunnel, requested_up, | |
1677 | requested_down); | |
1678 | } | |
1679 | ||
1680 | /* | |
1681 | * More bandwidth is requested. Release all the potential | |
1682 | * bandwidth from USB3 first. | |
1683 | */ | |
1684 | ret = tb_release_unused_usb3_bandwidth(tb, in, out); | |
1685 | if (ret) | |
1686 | return ret; | |
1687 | ||
1688 | /* | |
1689 | * Then go over all tunnels that cross the same USB4 ports (they | |
1690 | * are also in the same group but we use the same function here | |
1691 | * that we use with the normal bandwidth allocation). | |
1692 | */ | |
1693 | ret = tb_available_bandwidth(tb, in, out, &available_up, &available_down); | |
1694 | if (ret) | |
1695 | goto reclaim; | |
1696 | ||
1697 | tb_port_dbg(in, "bandwidth available for allocation %d/%d Mb/s\n", | |
1698 | available_up, available_down); | |
1699 | ||
1700 | if ((*requested_up >= 0 && available_up >= requested_up_corrected) || | |
1701 | (*requested_down >= 0 && available_down >= requested_down_corrected)) { | |
1702 | ret = tb_tunnel_alloc_bandwidth(tunnel, requested_up, | |
1703 | requested_down); | |
1704 | } else { | |
1705 | ret = -ENOBUFS; | |
1706 | } | |
1707 | ||
1708 | reclaim: | |
1709 | tb_reclaim_usb3_bandwidth(tb, in, out); | |
1710 | return ret; | |
1711 | } | |
1712 | ||
1713 | static void tb_handle_dp_bandwidth_request(struct work_struct *work) | |
1714 | { | |
1715 | struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); | |
1716 | int requested_bw, requested_up, requested_down, ret; | |
1717 | struct tb_port *in, *out; | |
1718 | struct tb_tunnel *tunnel; | |
1719 | struct tb *tb = ev->tb; | |
1720 | struct tb_cm *tcm = tb_priv(tb); | |
1721 | struct tb_switch *sw; | |
1722 | ||
1723 | pm_runtime_get_sync(&tb->dev); | |
1724 | ||
1725 | mutex_lock(&tb->lock); | |
1726 | if (!tcm->hotplug_active) | |
1727 | goto unlock; | |
1728 | ||
1729 | sw = tb_switch_find_by_route(tb, ev->route); | |
1730 | if (!sw) { | |
1731 | tb_warn(tb, "bandwidth request from non-existent router %llx\n", | |
1732 | ev->route); | |
1733 | goto unlock; | |
1734 | } | |
1735 | ||
1736 | in = &sw->ports[ev->port]; | |
1737 | if (!tb_port_is_dpin(in)) { | |
1738 | tb_port_warn(in, "bandwidth request to non-DP IN adapter\n"); | |
1739 | goto unlock; | |
1740 | } | |
1741 | ||
1742 | tb_port_dbg(in, "handling bandwidth allocation request\n"); | |
1743 | ||
1744 | if (!usb4_dp_port_bw_mode_enabled(in)) { | |
1745 | tb_port_warn(in, "bandwidth allocation mode not enabled\n"); | |
1746 | goto unlock; | |
1747 | } | |
1748 | ||
ace75e18 MW |
1749 | ret = usb4_dp_port_requested_bw(in); |
1750 | if (ret < 0) { | |
1751 | if (ret == -ENODATA) | |
1752 | tb_port_dbg(in, "no bandwidth request active\n"); | |
1753 | else | |
1754 | tb_port_warn(in, "failed to read requested bandwidth\n"); | |
6ce35635 MW |
1755 | goto unlock; |
1756 | } | |
ace75e18 | 1757 | requested_bw = ret; |
6ce35635 MW |
1758 | |
1759 | tb_port_dbg(in, "requested bandwidth %d Mb/s\n", requested_bw); | |
1760 | ||
1761 | tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL); | |
1762 | if (!tunnel) { | |
1763 | tb_port_warn(in, "failed to find tunnel\n"); | |
1764 | goto unlock; | |
1765 | } | |
1766 | ||
1767 | out = tunnel->dst_port; | |
1768 | ||
1769 | if (in->sw->config.depth < out->sw->config.depth) { | |
1770 | requested_up = -1; | |
1771 | requested_down = requested_bw; | |
1772 | } else { | |
1773 | requested_up = requested_bw; | |
1774 | requested_down = -1; | |
1775 | } | |
1776 | ||
1777 | ret = tb_alloc_dp_bandwidth(tunnel, &requested_up, &requested_down); | |
1778 | if (ret) { | |
1779 | if (ret == -ENOBUFS) | |
1780 | tb_port_warn(in, "not enough bandwidth available\n"); | |
1781 | else | |
1782 | tb_port_warn(in, "failed to change bandwidth allocation\n"); | |
1783 | } else { | |
1784 | tb_port_dbg(in, "bandwidth allocation changed to %d/%d Mb/s\n", | |
1785 | requested_up, requested_down); | |
1786 | ||
1787 | /* Update other clients about the allocation change */ | |
1788 | tb_recalc_estimated_bandwidth(tb); | |
1789 | } | |
1790 | ||
1791 | unlock: | |
1792 | mutex_unlock(&tb->lock); | |
1793 | ||
1794 | pm_runtime_mark_last_busy(&tb->dev); | |
1795 | pm_runtime_put_autosuspend(&tb->dev); | |
1796 | } | |
1797 | ||
1798 | static void tb_queue_dp_bandwidth_request(struct tb *tb, u64 route, u8 port) | |
1799 | { | |
1800 | struct tb_hotplug_event *ev; | |
1801 | ||
1802 | ev = kmalloc(sizeof(*ev), GFP_KERNEL); | |
1803 | if (!ev) | |
1804 | return; | |
1805 | ||
1806 | ev->tb = tb; | |
1807 | ev->route = route; | |
1808 | ev->port = port; | |
1809 | INIT_WORK(&ev->work, tb_handle_dp_bandwidth_request); | |
1810 | queue_work(tb->wq, &ev->work); | |
1811 | } | |
1812 | ||
1813 | static void tb_handle_notification(struct tb *tb, u64 route, | |
1814 | const struct cfg_error_pkg *error) | |
1815 | { | |
1816 | if (tb_cfg_ack_notification(tb->ctl, route, error)) | |
1817 | tb_warn(tb, "could not ack notification on %llx\n", route); | |
1818 | ||
1819 | switch (error->error) { | |
1820 | case TB_CFG_ERROR_DP_BW: | |
1821 | tb_queue_dp_bandwidth_request(tb, route, error->port); | |
1822 | break; | |
1823 | ||
1824 | default: | |
1825 | /* Ack is enough */ | |
1826 | return; | |
1827 | } | |
1828 | } | |
1829 | ||
877e50b3 | 1830 | /* |
d6cc51cd AN |
1831 | * tb_schedule_hotplug_handler() - callback function for the control channel |
1832 | * | |
1833 | * Delegates to tb_handle_hotplug. | |
1834 | */ | |
81a54b5e MW |
1835 | static void tb_handle_event(struct tb *tb, enum tb_cfg_pkg_type type, |
1836 | const void *buf, size_t size) | |
d6cc51cd | 1837 | { |
81a54b5e | 1838 | const struct cfg_event_pkg *pkg = buf; |
6ce35635 | 1839 | u64 route = tb_cfg_get_route(&pkg->header); |
81a54b5e | 1840 | |
6ce35635 MW |
1841 | switch (type) { |
1842 | case TB_CFG_PKG_ERROR: | |
1843 | tb_handle_notification(tb, route, (const struct cfg_error_pkg *)buf); | |
1844 | return; | |
1845 | case TB_CFG_PKG_EVENT: | |
1846 | break; | |
1847 | default: | |
81a54b5e MW |
1848 | tb_warn(tb, "unexpected event %#x, ignoring\n", type); |
1849 | return; | |
1850 | } | |
1851 | ||
210e9f56 | 1852 | if (tb_cfg_ack_plug(tb->ctl, route, pkg->port, pkg->unplug)) { |
81a54b5e MW |
1853 | tb_warn(tb, "could not ack plug event on %llx:%x\n", route, |
1854 | pkg->port); | |
1855 | } | |
1856 | ||
4f807e47 | 1857 | tb_queue_hotplug(tb, route, pkg->port, pkg->unplug); |
d6cc51cd AN |
1858 | } |
1859 | ||
9d3cce0b | 1860 | static void tb_stop(struct tb *tb) |
d6cc51cd | 1861 | { |
9d3cce0b | 1862 | struct tb_cm *tcm = tb_priv(tb); |
93f36ade MW |
1863 | struct tb_tunnel *tunnel; |
1864 | struct tb_tunnel *n; | |
3364f0c1 | 1865 | |
6ac6faee | 1866 | cancel_delayed_work(&tcm->remove_work); |
3364f0c1 | 1867 | /* tunnels are only present after everything has been initialized */ |
7ea4cd6b MW |
1868 | list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { |
1869 | /* | |
1870 | * DMA tunnels require the driver to be functional so we | |
1871 | * tear them down. Other protocol tunnels can be left | |
1872 | * intact. | |
1873 | */ | |
1874 | if (tb_tunnel_is_dma(tunnel)) | |
1875 | tb_tunnel_deactivate(tunnel); | |
93f36ade | 1876 | tb_tunnel_free(tunnel); |
7ea4cd6b | 1877 | } |
bfe778ac | 1878 | tb_switch_remove(tb->root_switch); |
9d3cce0b | 1879 | tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ |
d6cc51cd AN |
1880 | } |
1881 | ||
99cabbb0 MW |
1882 | static int tb_scan_finalize_switch(struct device *dev, void *data) |
1883 | { | |
1884 | if (tb_is_switch(dev)) { | |
1885 | struct tb_switch *sw = tb_to_switch(dev); | |
1886 | ||
1887 | /* | |
1888 | * If we found that the switch was already setup by the | |
1889 | * boot firmware, mark it as authorized now before we | |
1890 | * send uevent to userspace. | |
1891 | */ | |
1892 | if (sw->boot) | |
1893 | sw->authorized = 1; | |
1894 | ||
1895 | dev_set_uevent_suppress(dev, false); | |
1896 | kobject_uevent(&dev->kobj, KOBJ_ADD); | |
1897 | device_for_each_child(dev, NULL, tb_scan_finalize_switch); | |
1898 | } | |
1899 | ||
1900 | return 0; | |
1901 | } | |
1902 | ||
9d3cce0b | 1903 | static int tb_start(struct tb *tb) |
d6cc51cd | 1904 | { |
9d3cce0b | 1905 | struct tb_cm *tcm = tb_priv(tb); |
bfe778ac | 1906 | int ret; |
d6cc51cd | 1907 | |
bfe778ac | 1908 | tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0); |
444ac384 MW |
1909 | if (IS_ERR(tb->root_switch)) |
1910 | return PTR_ERR(tb->root_switch); | |
a25c8b2f | 1911 | |
e6b245cc MW |
1912 | /* |
1913 | * ICM firmware upgrade needs running firmware and in native | |
1914 | * mode that is not available so disable firmware upgrade of the | |
1915 | * root switch. | |
5172eb9a SC |
1916 | * |
1917 | * However, USB4 routers support NVM firmware upgrade if they | |
1918 | * implement the necessary router operations. | |
e6b245cc | 1919 | */ |
5172eb9a | 1920 | tb->root_switch->no_nvm_upgrade = !tb_switch_is_usb4(tb->root_switch); |
6ac6faee MW |
1921 | /* All USB4 routers support runtime PM */ |
1922 | tb->root_switch->rpm = tb_switch_is_usb4(tb->root_switch); | |
e6b245cc | 1923 | |
bfe778ac MW |
1924 | ret = tb_switch_configure(tb->root_switch); |
1925 | if (ret) { | |
1926 | tb_switch_put(tb->root_switch); | |
1927 | return ret; | |
1928 | } | |
1929 | ||
1930 | /* Announce the switch to the world */ | |
1931 | ret = tb_switch_add(tb->root_switch); | |
1932 | if (ret) { | |
1933 | tb_switch_put(tb->root_switch); | |
1934 | return ret; | |
1935 | } | |
1936 | ||
b017a46d GF |
1937 | /* |
1938 | * To support highest CLx state, we set host router's TMU to | |
1939 | * Normal mode. | |
1940 | */ | |
1941 | tb_switch_tmu_configure(tb->root_switch, TB_SWITCH_TMU_RATE_NORMAL, | |
1942 | false); | |
cf29b9af RM |
1943 | /* Enable TMU if it is off */ |
1944 | tb_switch_tmu_enable(tb->root_switch); | |
9da672a4 AN |
1945 | /* Full scan to discover devices added before the driver was loaded. */ |
1946 | tb_scan_switch(tb->root_switch); | |
0414bec5 | 1947 | /* Find out tunnels created by the boot firmware */ |
43bddb26 | 1948 | tb_discover_tunnels(tb); |
b60e31bf SM |
1949 | /* Add DP resources from the DP tunnels created by the boot firmware */ |
1950 | tb_discover_dp_resources(tb); | |
e6f81858 RM |
1951 | /* |
1952 | * If the boot firmware did not create USB 3.x tunnels create them | |
1953 | * now for the whole topology. | |
1954 | */ | |
1955 | tb_create_usb3_tunnels(tb->root_switch); | |
8afe909b MW |
1956 | /* Add DP IN resources for the root switch */ |
1957 | tb_add_dp_resources(tb->root_switch); | |
99cabbb0 MW |
1958 | /* Make the discovered switches available to the userspace */ |
1959 | device_for_each_child(&tb->root_switch->dev, NULL, | |
1960 | tb_scan_finalize_switch); | |
9da672a4 | 1961 | |
d6cc51cd | 1962 | /* Allow tb_handle_hotplug to progress events */ |
9d3cce0b MW |
1963 | tcm->hotplug_active = true; |
1964 | return 0; | |
d6cc51cd AN |
1965 | } |
1966 | ||
9d3cce0b | 1967 | static int tb_suspend_noirq(struct tb *tb) |
23dd5bb4 | 1968 | { |
9d3cce0b MW |
1969 | struct tb_cm *tcm = tb_priv(tb); |
1970 | ||
daa5140f | 1971 | tb_dbg(tb, "suspending...\n"); |
81a2e3e4 | 1972 | tb_disconnect_and_release_dp(tb); |
6ac6faee | 1973 | tb_switch_suspend(tb->root_switch, false); |
9d3cce0b | 1974 | tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ |
daa5140f | 1975 | tb_dbg(tb, "suspend finished\n"); |
9d3cce0b MW |
1976 | |
1977 | return 0; | |
23dd5bb4 AN |
1978 | } |
1979 | ||
91c0c120 MW |
1980 | static void tb_restore_children(struct tb_switch *sw) |
1981 | { | |
1982 | struct tb_port *port; | |
990f4b85 | 1983 | int ret; |
91c0c120 | 1984 | |
6ac6faee MW |
1985 | /* No need to restore if the router is already unplugged */ |
1986 | if (sw->is_unplugged) | |
1987 | return; | |
1988 | ||
a28ec0e1 | 1989 | /* |
b017a46d GF |
1990 | * CL0s and CL1 are enabled and supported together. |
1991 | * Silently ignore CLx re-enabling in case CLx is not supported. | |
a28ec0e1 | 1992 | */ |
b017a46d GF |
1993 | ret = tb_switch_enable_clx(sw, TB_CL1); |
1994 | if (ret && ret != -EOPNOTSUPP) | |
1995 | tb_sw_warn(sw, "failed to re-enable %s on upstream port\n", | |
1996 | tb_switch_clx_name(TB_CL1)); | |
1997 | ||
1998 | if (tb_switch_is_clx_enabled(sw, TB_CL1)) | |
1999 | /* | |
2000 | * To support highest CLx state, we set router's TMU to | |
2001 | * Normal-Uni mode. | |
2002 | */ | |
2003 | tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_NORMAL, true); | |
2004 | else | |
2005 | /* If CLx disabled, configure router's TMU to HiFi-Bidir mode*/ | |
2006 | tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, false); | |
2007 | ||
cf29b9af RM |
2008 | if (tb_enable_tmu(sw)) |
2009 | tb_sw_warn(sw, "failed to restore TMU configuration\n"); | |
2010 | ||
91c0c120 | 2011 | tb_switch_for_each_port(sw, port) { |
284652a4 | 2012 | if (!tb_port_has_remote(port) && !port->xdomain) |
91c0c120 MW |
2013 | continue; |
2014 | ||
284652a4 MW |
2015 | if (port->remote) { |
2016 | tb_switch_lane_bonding_enable(port->remote->sw); | |
2017 | tb_switch_configure_link(port->remote->sw); | |
91c0c120 | 2018 | |
284652a4 MW |
2019 | tb_restore_children(port->remote->sw); |
2020 | } else if (port->xdomain) { | |
f9cad07b | 2021 | tb_port_configure_xdomain(port, port->xdomain); |
284652a4 | 2022 | } |
91c0c120 MW |
2023 | } |
2024 | } | |
2025 | ||
9d3cce0b | 2026 | static int tb_resume_noirq(struct tb *tb) |
23dd5bb4 | 2027 | { |
9d3cce0b | 2028 | struct tb_cm *tcm = tb_priv(tb); |
93f36ade | 2029 | struct tb_tunnel *tunnel, *n; |
43bddb26 MW |
2030 | unsigned int usb3_delay = 0; |
2031 | LIST_HEAD(tunnels); | |
9d3cce0b | 2032 | |
daa5140f | 2033 | tb_dbg(tb, "resuming...\n"); |
23dd5bb4 AN |
2034 | |
2035 | /* remove any pci devices the firmware might have setup */ | |
356b6c4e | 2036 | tb_switch_reset(tb->root_switch); |
23dd5bb4 AN |
2037 | |
2038 | tb_switch_resume(tb->root_switch); | |
2039 | tb_free_invalid_tunnels(tb); | |
2040 | tb_free_unplugged_children(tb->root_switch); | |
91c0c120 | 2041 | tb_restore_children(tb->root_switch); |
43bddb26 MW |
2042 | |
2043 | /* | |
2044 | * If we get here from suspend to disk the boot firmware or the | |
2045 | * restore kernel might have created tunnels of its own. Since | |
2046 | * we cannot be sure they are usable for us we find and tear | |
2047 | * them down. | |
2048 | */ | |
2049 | tb_switch_discover_tunnels(tb->root_switch, &tunnels, false); | |
2050 | list_for_each_entry_safe_reverse(tunnel, n, &tunnels, list) { | |
2051 | if (tb_tunnel_is_usb3(tunnel)) | |
2052 | usb3_delay = 500; | |
2053 | tb_tunnel_deactivate(tunnel); | |
2054 | tb_tunnel_free(tunnel); | |
2055 | } | |
2056 | ||
2057 | /* Re-create our tunnels now */ | |
2058 | list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { | |
2059 | /* USB3 requires delay before it can be re-activated */ | |
2060 | if (tb_tunnel_is_usb3(tunnel)) { | |
2061 | msleep(usb3_delay); | |
2062 | /* Only need to do it once */ | |
2063 | usb3_delay = 0; | |
2064 | } | |
93f36ade | 2065 | tb_tunnel_restart(tunnel); |
43bddb26 | 2066 | } |
9d3cce0b | 2067 | if (!list_empty(&tcm->tunnel_list)) { |
23dd5bb4 AN |
2068 | /* |
2069 | * the pcie links need some time to get going. | |
2070 | * 100ms works for me... | |
2071 | */ | |
daa5140f | 2072 | tb_dbg(tb, "tunnels restarted, sleeping for 100ms\n"); |
23dd5bb4 AN |
2073 | msleep(100); |
2074 | } | |
2075 | /* Allow tb_handle_hotplug to progress events */ | |
9d3cce0b | 2076 | tcm->hotplug_active = true; |
daa5140f | 2077 | tb_dbg(tb, "resume finished\n"); |
9d3cce0b MW |
2078 | |
2079 | return 0; | |
2080 | } | |
2081 | ||
7ea4cd6b MW |
2082 | static int tb_free_unplugged_xdomains(struct tb_switch *sw) |
2083 | { | |
b433d010 MW |
2084 | struct tb_port *port; |
2085 | int ret = 0; | |
7ea4cd6b | 2086 | |
b433d010 | 2087 | tb_switch_for_each_port(sw, port) { |
7ea4cd6b MW |
2088 | if (tb_is_upstream_port(port)) |
2089 | continue; | |
2090 | if (port->xdomain && port->xdomain->is_unplugged) { | |
dacb1287 | 2091 | tb_retimer_remove_all(port); |
7ea4cd6b | 2092 | tb_xdomain_remove(port->xdomain); |
284652a4 | 2093 | tb_port_unconfigure_xdomain(port); |
7ea4cd6b MW |
2094 | port->xdomain = NULL; |
2095 | ret++; | |
2096 | } else if (port->remote) { | |
2097 | ret += tb_free_unplugged_xdomains(port->remote->sw); | |
2098 | } | |
2099 | } | |
2100 | ||
2101 | return ret; | |
2102 | } | |
2103 | ||
884e4d57 MW |
2104 | static int tb_freeze_noirq(struct tb *tb) |
2105 | { | |
2106 | struct tb_cm *tcm = tb_priv(tb); | |
2107 | ||
2108 | tcm->hotplug_active = false; | |
2109 | return 0; | |
2110 | } | |
2111 | ||
2112 | static int tb_thaw_noirq(struct tb *tb) | |
2113 | { | |
2114 | struct tb_cm *tcm = tb_priv(tb); | |
2115 | ||
2116 | tcm->hotplug_active = true; | |
2117 | return 0; | |
2118 | } | |
2119 | ||
7ea4cd6b MW |
2120 | static void tb_complete(struct tb *tb) |
2121 | { | |
2122 | /* | |
2123 | * Release any unplugged XDomains and if there is a case where | |
2124 | * another domain is swapped in place of unplugged XDomain we | |
2125 | * need to run another rescan. | |
2126 | */ | |
2127 | mutex_lock(&tb->lock); | |
2128 | if (tb_free_unplugged_xdomains(tb->root_switch)) | |
2129 | tb_scan_switch(tb->root_switch); | |
2130 | mutex_unlock(&tb->lock); | |
2131 | } | |
2132 | ||
6ac6faee MW |
2133 | static int tb_runtime_suspend(struct tb *tb) |
2134 | { | |
2135 | struct tb_cm *tcm = tb_priv(tb); | |
2136 | ||
2137 | mutex_lock(&tb->lock); | |
2138 | tb_switch_suspend(tb->root_switch, true); | |
2139 | tcm->hotplug_active = false; | |
2140 | mutex_unlock(&tb->lock); | |
2141 | ||
2142 | return 0; | |
2143 | } | |
2144 | ||
2145 | static void tb_remove_work(struct work_struct *work) | |
2146 | { | |
2147 | struct tb_cm *tcm = container_of(work, struct tb_cm, remove_work.work); | |
2148 | struct tb *tb = tcm_to_tb(tcm); | |
2149 | ||
2150 | mutex_lock(&tb->lock); | |
2151 | if (tb->root_switch) { | |
2152 | tb_free_unplugged_children(tb->root_switch); | |
2153 | tb_free_unplugged_xdomains(tb->root_switch); | |
2154 | } | |
2155 | mutex_unlock(&tb->lock); | |
2156 | } | |
2157 | ||
2158 | static int tb_runtime_resume(struct tb *tb) | |
2159 | { | |
2160 | struct tb_cm *tcm = tb_priv(tb); | |
2161 | struct tb_tunnel *tunnel, *n; | |
2162 | ||
2163 | mutex_lock(&tb->lock); | |
2164 | tb_switch_resume(tb->root_switch); | |
2165 | tb_free_invalid_tunnels(tb); | |
2166 | tb_restore_children(tb->root_switch); | |
2167 | list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) | |
2168 | tb_tunnel_restart(tunnel); | |
2169 | tcm->hotplug_active = true; | |
2170 | mutex_unlock(&tb->lock); | |
2171 | ||
2172 | /* | |
2173 | * Schedule cleanup of any unplugged devices. Run this in a | |
2174 | * separate thread to avoid possible deadlock if the device | |
2175 | * removal runtime resumes the unplugged device. | |
2176 | */ | |
2177 | queue_delayed_work(tb->wq, &tcm->remove_work, msecs_to_jiffies(50)); | |
2178 | return 0; | |
2179 | } | |
2180 | ||
9d3cce0b MW |
2181 | static const struct tb_cm_ops tb_cm_ops = { |
2182 | .start = tb_start, | |
2183 | .stop = tb_stop, | |
2184 | .suspend_noirq = tb_suspend_noirq, | |
2185 | .resume_noirq = tb_resume_noirq, | |
884e4d57 MW |
2186 | .freeze_noirq = tb_freeze_noirq, |
2187 | .thaw_noirq = tb_thaw_noirq, | |
7ea4cd6b | 2188 | .complete = tb_complete, |
6ac6faee MW |
2189 | .runtime_suspend = tb_runtime_suspend, |
2190 | .runtime_resume = tb_runtime_resume, | |
81a54b5e | 2191 | .handle_event = tb_handle_event, |
3da88be2 | 2192 | .disapprove_switch = tb_disconnect_pci, |
99cabbb0 | 2193 | .approve_switch = tb_tunnel_pci, |
7ea4cd6b MW |
2194 | .approve_xdomain_paths = tb_approve_xdomain_paths, |
2195 | .disconnect_xdomain_paths = tb_disconnect_xdomain_paths, | |
9d3cce0b MW |
2196 | }; |
2197 | ||
349bfe08 MW |
2198 | /* |
2199 | * During suspend the Thunderbolt controller is reset and all PCIe | |
2200 | * tunnels are lost. The NHI driver will try to reestablish all tunnels | |
2201 | * during resume. This adds device links between the tunneled PCIe | |
2202 | * downstream ports and the NHI so that the device core will make sure | |
2203 | * NHI is resumed first before the rest. | |
2204 | */ | |
2205 | static void tb_apple_add_links(struct tb_nhi *nhi) | |
2206 | { | |
2207 | struct pci_dev *upstream, *pdev; | |
2208 | ||
2209 | if (!x86_apple_machine) | |
2210 | return; | |
2211 | ||
2212 | switch (nhi->pdev->device) { | |
2213 | case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE: | |
2214 | case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C: | |
2215 | case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI: | |
2216 | case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI: | |
2217 | break; | |
2218 | default: | |
2219 | return; | |
2220 | } | |
2221 | ||
2222 | upstream = pci_upstream_bridge(nhi->pdev); | |
2223 | while (upstream) { | |
2224 | if (!pci_is_pcie(upstream)) | |
2225 | return; | |
2226 | if (pci_pcie_type(upstream) == PCI_EXP_TYPE_UPSTREAM) | |
2227 | break; | |
2228 | upstream = pci_upstream_bridge(upstream); | |
2229 | } | |
2230 | ||
2231 | if (!upstream) | |
2232 | return; | |
2233 | ||
2234 | /* | |
2235 | * For each hotplug downstream port, create add device link | |
2236 | * back to NHI so that PCIe tunnels can be re-established after | |
2237 | * sleep. | |
2238 | */ | |
2239 | for_each_pci_bridge(pdev, upstream->subordinate) { | |
2240 | const struct device_link *link; | |
2241 | ||
2242 | if (!pci_is_pcie(pdev)) | |
2243 | continue; | |
2244 | if (pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM || | |
2245 | !pdev->is_hotplug_bridge) | |
2246 | continue; | |
2247 | ||
2248 | link = device_link_add(&pdev->dev, &nhi->pdev->dev, | |
2249 | DL_FLAG_AUTOREMOVE_SUPPLIER | | |
2250 | DL_FLAG_PM_RUNTIME); | |
2251 | if (link) { | |
2252 | dev_dbg(&nhi->pdev->dev, "created link from %s\n", | |
2253 | dev_name(&pdev->dev)); | |
2254 | } else { | |
2255 | dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n", | |
2256 | dev_name(&pdev->dev)); | |
2257 | } | |
2258 | } | |
2259 | } | |
2260 | ||
9d3cce0b MW |
2261 | struct tb *tb_probe(struct tb_nhi *nhi) |
2262 | { | |
2263 | struct tb_cm *tcm; | |
2264 | struct tb *tb; | |
2265 | ||
7f0a34d7 | 2266 | tb = tb_domain_alloc(nhi, TB_TIMEOUT, sizeof(*tcm)); |
9d3cce0b MW |
2267 | if (!tb) |
2268 | return NULL; | |
2269 | ||
c6da62a2 MW |
2270 | if (tb_acpi_may_tunnel_pcie()) |
2271 | tb->security_level = TB_SECURITY_USER; | |
2272 | else | |
2273 | tb->security_level = TB_SECURITY_NOPCIE; | |
2274 | ||
9d3cce0b MW |
2275 | tb->cm_ops = &tb_cm_ops; |
2276 | ||
2277 | tcm = tb_priv(tb); | |
2278 | INIT_LIST_HEAD(&tcm->tunnel_list); | |
8afe909b | 2279 | INIT_LIST_HEAD(&tcm->dp_resources); |
6ac6faee | 2280 | INIT_DELAYED_WORK(&tcm->remove_work, tb_remove_work); |
6ce35635 | 2281 | tb_init_bandwidth_groups(tcm); |
9d3cce0b | 2282 | |
e0258805 MW |
2283 | tb_dbg(tb, "using software connection manager\n"); |
2284 | ||
349bfe08 MW |
2285 | tb_apple_add_links(nhi); |
2286 | tb_acpi_add_links(nhi); | |
2287 | ||
9d3cce0b | 2288 | return tb; |
23dd5bb4 | 2289 | } |