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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 | */ | |
23257cfc MW |
761 | |
762 | if (port->usb4) | |
763 | pm_runtime_get_sync(&port->usb4->dev); | |
764 | ||
9da672a4 | 765 | if (tb_wait_for_port(port, false) <= 0) |
23257cfc | 766 | goto out_rpm_put; |
9da672a4 | 767 | if (port->remote) { |
7ea4cd6b | 768 | tb_port_dbg(port, "port already has a remote\n"); |
23257cfc | 769 | goto out_rpm_put; |
9da672a4 | 770 | } |
dacb1287 | 771 | |
3fb10ea4 | 772 | tb_retimer_scan(port, true); |
dacb1287 | 773 | |
bfe778ac MW |
774 | sw = tb_switch_alloc(port->sw->tb, &port->sw->dev, |
775 | tb_downstream_route(port)); | |
7ea4cd6b MW |
776 | if (IS_ERR(sw)) { |
777 | /* | |
778 | * If there is an error accessing the connected switch | |
779 | * it may be connected to another domain. Also we allow | |
780 | * the other domain to be connected to a max depth switch. | |
781 | */ | |
782 | if (PTR_ERR(sw) == -EIO || PTR_ERR(sw) == -EADDRNOTAVAIL) | |
783 | tb_scan_xdomain(port); | |
23257cfc | 784 | goto out_rpm_put; |
7ea4cd6b | 785 | } |
bfe778ac MW |
786 | |
787 | if (tb_switch_configure(sw)) { | |
788 | tb_switch_put(sw); | |
23257cfc | 789 | goto out_rpm_put; |
bfe778ac MW |
790 | } |
791 | ||
7ea4cd6b MW |
792 | /* |
793 | * If there was previously another domain connected remove it | |
794 | * first. | |
795 | */ | |
796 | if (port->xdomain) { | |
797 | tb_xdomain_remove(port->xdomain); | |
284652a4 | 798 | tb_port_unconfigure_xdomain(port); |
7ea4cd6b MW |
799 | port->xdomain = NULL; |
800 | } | |
801 | ||
99cabbb0 MW |
802 | /* |
803 | * Do not send uevents until we have discovered all existing | |
804 | * tunnels and know which switches were authorized already by | |
805 | * the boot firmware. | |
806 | */ | |
807 | if (!tcm->hotplug_active) | |
808 | dev_set_uevent_suppress(&sw->dev, true); | |
f67cf491 | 809 | |
6ac6faee MW |
810 | /* |
811 | * At the moment Thunderbolt 2 and beyond (devices with LC) we | |
812 | * can support runtime PM. | |
813 | */ | |
814 | sw->rpm = sw->generation > 1; | |
815 | ||
bfe778ac MW |
816 | if (tb_switch_add(sw)) { |
817 | tb_switch_put(sw); | |
23257cfc | 818 | goto out_rpm_put; |
bfe778ac MW |
819 | } |
820 | ||
dfe40ca4 MW |
821 | /* Link the switches using both links if available */ |
822 | upstream_port = tb_upstream_port(sw); | |
823 | port->remote = upstream_port; | |
824 | upstream_port->remote = port; | |
825 | if (port->dual_link_port && upstream_port->dual_link_port) { | |
826 | port->dual_link_port->remote = upstream_port->dual_link_port; | |
827 | upstream_port->dual_link_port->remote = port->dual_link_port; | |
828 | } | |
829 | ||
91c0c120 | 830 | /* Enable lane bonding if supported */ |
2ca3263a | 831 | tb_switch_lane_bonding_enable(sw); |
de462039 MW |
832 | /* Set the link configured */ |
833 | tb_switch_configure_link(sw); | |
b017a46d GF |
834 | /* |
835 | * CL0s and CL1 are enabled and supported together. | |
836 | * Silently ignore CLx enabling in case CLx is not supported. | |
837 | */ | |
838 | ret = tb_switch_enable_clx(sw, TB_CL1); | |
990f4b85 | 839 | if (ret && ret != -EOPNOTSUPP) |
b017a46d GF |
840 | tb_sw_warn(sw, "failed to enable %s on upstream port\n", |
841 | tb_switch_clx_name(TB_CL1)); | |
8a90e4fa | 842 | |
b017a46d GF |
843 | if (tb_switch_is_clx_enabled(sw, TB_CL1)) |
844 | /* | |
845 | * To support highest CLx state, we set router's TMU to | |
846 | * Normal-Uni mode. | |
847 | */ | |
848 | tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_NORMAL, true); | |
849 | else | |
850 | /* If CLx disabled, configure router's TMU to HiFi-Bidir mode*/ | |
851 | tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, false); | |
91c0c120 | 852 | |
cf29b9af RM |
853 | if (tb_enable_tmu(sw)) |
854 | tb_sw_warn(sw, "failed to enable TMU\n"); | |
855 | ||
dacb1287 | 856 | /* Scan upstream retimers */ |
3fb10ea4 | 857 | tb_retimer_scan(upstream_port, true); |
dacb1287 | 858 | |
e6f81858 RM |
859 | /* |
860 | * Create USB 3.x tunnels only when the switch is plugged to the | |
861 | * domain. This is because we scan the domain also during discovery | |
862 | * and want to discover existing USB 3.x tunnels before we create | |
863 | * any new. | |
864 | */ | |
865 | if (tcm->hotplug_active && tb_tunnel_usb3(sw->tb, sw)) | |
866 | tb_sw_warn(sw, "USB3 tunnel creation failed\n"); | |
867 | ||
e876f34a | 868 | tb_add_dp_resources(sw); |
9da672a4 | 869 | tb_scan_switch(sw); |
23257cfc MW |
870 | |
871 | out_rpm_put: | |
872 | if (port->usb4) { | |
873 | pm_runtime_mark_last_busy(&port->usb4->dev); | |
874 | pm_runtime_put_autosuspend(&port->usb4->dev); | |
875 | } | |
9da672a4 AN |
876 | } |
877 | ||
8afe909b MW |
878 | static void tb_deactivate_and_free_tunnel(struct tb_tunnel *tunnel) |
879 | { | |
0bd680cd MW |
880 | struct tb_port *src_port, *dst_port; |
881 | struct tb *tb; | |
882 | ||
8afe909b MW |
883 | if (!tunnel) |
884 | return; | |
885 | ||
886 | tb_tunnel_deactivate(tunnel); | |
887 | list_del(&tunnel->list); | |
888 | ||
0bd680cd MW |
889 | tb = tunnel->tb; |
890 | src_port = tunnel->src_port; | |
891 | dst_port = tunnel->dst_port; | |
892 | ||
893 | switch (tunnel->type) { | |
894 | case TB_TUNNEL_DP: | |
6ce35635 | 895 | tb_detach_bandwidth_group(src_port); |
0bd680cd MW |
896 | /* |
897 | * In case of DP tunnel make sure the DP IN resource is | |
898 | * deallocated properly. | |
899 | */ | |
900 | tb_switch_dealloc_dp_resource(src_port->sw, src_port); | |
6ac6faee MW |
901 | /* Now we can allow the domain to runtime suspend again */ |
902 | pm_runtime_mark_last_busy(&dst_port->sw->dev); | |
903 | pm_runtime_put_autosuspend(&dst_port->sw->dev); | |
904 | pm_runtime_mark_last_busy(&src_port->sw->dev); | |
905 | pm_runtime_put_autosuspend(&src_port->sw->dev); | |
0bd680cd MW |
906 | fallthrough; |
907 | ||
908 | case TB_TUNNEL_USB3: | |
909 | tb_reclaim_usb3_bandwidth(tb, src_port, dst_port); | |
910 | break; | |
8afe909b | 911 | |
0bd680cd MW |
912 | default: |
913 | /* | |
914 | * PCIe and DMA tunnels do not consume guaranteed | |
915 | * bandwidth. | |
916 | */ | |
917 | break; | |
8afe909b MW |
918 | } |
919 | ||
920 | tb_tunnel_free(tunnel); | |
4f807e47 MW |
921 | } |
922 | ||
877e50b3 | 923 | /* |
3364f0c1 AN |
924 | * tb_free_invalid_tunnels() - destroy tunnels of devices that have gone away |
925 | */ | |
926 | static void tb_free_invalid_tunnels(struct tb *tb) | |
927 | { | |
9d3cce0b | 928 | struct tb_cm *tcm = tb_priv(tb); |
93f36ade MW |
929 | struct tb_tunnel *tunnel; |
930 | struct tb_tunnel *n; | |
9d3cce0b MW |
931 | |
932 | list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { | |
8afe909b MW |
933 | if (tb_tunnel_is_invalid(tunnel)) |
934 | tb_deactivate_and_free_tunnel(tunnel); | |
3364f0c1 AN |
935 | } |
936 | } | |
937 | ||
877e50b3 | 938 | /* |
23dd5bb4 AN |
939 | * tb_free_unplugged_children() - traverse hierarchy and free unplugged switches |
940 | */ | |
941 | static void tb_free_unplugged_children(struct tb_switch *sw) | |
942 | { | |
b433d010 | 943 | struct tb_port *port; |
dfe40ca4 | 944 | |
b433d010 | 945 | tb_switch_for_each_port(sw, port) { |
dfe40ca4 | 946 | if (!tb_port_has_remote(port)) |
23dd5bb4 | 947 | continue; |
dfe40ca4 | 948 | |
23dd5bb4 | 949 | if (port->remote->sw->is_unplugged) { |
dacb1287 | 950 | tb_retimer_remove_all(port); |
8afe909b | 951 | tb_remove_dp_resources(port->remote->sw); |
de462039 | 952 | tb_switch_unconfigure_link(port->remote->sw); |
91c0c120 | 953 | tb_switch_lane_bonding_disable(port->remote->sw); |
bfe778ac | 954 | tb_switch_remove(port->remote->sw); |
23dd5bb4 | 955 | port->remote = NULL; |
dfe40ca4 MW |
956 | if (port->dual_link_port) |
957 | port->dual_link_port->remote = NULL; | |
23dd5bb4 AN |
958 | } else { |
959 | tb_free_unplugged_children(port->remote->sw); | |
960 | } | |
961 | } | |
962 | } | |
963 | ||
99cabbb0 MW |
964 | static struct tb_port *tb_find_pcie_down(struct tb_switch *sw, |
965 | const struct tb_port *port) | |
3364f0c1 | 966 | { |
b0407983 MW |
967 | struct tb_port *down = NULL; |
968 | ||
99cabbb0 MW |
969 | /* |
970 | * To keep plugging devices consistently in the same PCIe | |
b0407983 | 971 | * hierarchy, do mapping here for switch downstream PCIe ports. |
99cabbb0 | 972 | */ |
b0407983 MW |
973 | if (tb_switch_is_usb4(sw)) { |
974 | down = usb4_switch_map_pcie_down(sw, port); | |
975 | } else if (!tb_route(sw)) { | |
99cabbb0 MW |
976 | int phy_port = tb_phy_port_from_link(port->port); |
977 | int index; | |
9d3cce0b | 978 | |
99cabbb0 MW |
979 | /* |
980 | * Hard-coded Thunderbolt port to PCIe down port mapping | |
981 | * per controller. | |
982 | */ | |
7bffd97e MW |
983 | if (tb_switch_is_cactus_ridge(sw) || |
984 | tb_switch_is_alpine_ridge(sw)) | |
99cabbb0 | 985 | index = !phy_port ? 6 : 7; |
17a8f815 | 986 | else if (tb_switch_is_falcon_ridge(sw)) |
99cabbb0 | 987 | index = !phy_port ? 6 : 8; |
7bffd97e MW |
988 | else if (tb_switch_is_titan_ridge(sw)) |
989 | index = !phy_port ? 8 : 9; | |
99cabbb0 MW |
990 | else |
991 | goto out; | |
992 | ||
993 | /* Validate the hard-coding */ | |
994 | if (WARN_ON(index > sw->config.max_port_number)) | |
995 | goto out; | |
b0407983 MW |
996 | |
997 | down = &sw->ports[index]; | |
998 | } | |
999 | ||
1000 | if (down) { | |
1001 | if (WARN_ON(!tb_port_is_pcie_down(down))) | |
99cabbb0 | 1002 | goto out; |
9cac51a0 | 1003 | if (tb_pci_port_is_enabled(down)) |
99cabbb0 MW |
1004 | goto out; |
1005 | ||
b0407983 | 1006 | return down; |
99cabbb0 | 1007 | } |
3364f0c1 | 1008 | |
99cabbb0 | 1009 | out: |
e78db6f0 | 1010 | return tb_find_unused_port(sw, TB_TYPE_PCIE_DOWN); |
99cabbb0 | 1011 | } |
3364f0c1 | 1012 | |
6ce35635 MW |
1013 | static void |
1014 | tb_recalc_estimated_bandwidth_for_group(struct tb_bandwidth_group *group) | |
1015 | { | |
1016 | struct tb_tunnel *first_tunnel; | |
1017 | struct tb *tb = group->tb; | |
1018 | struct tb_port *in; | |
1019 | int ret; | |
1020 | ||
1021 | tb_dbg(tb, "re-calculating bandwidth estimation for group %u\n", | |
1022 | group->index); | |
1023 | ||
1024 | first_tunnel = NULL; | |
1025 | list_for_each_entry(in, &group->ports, group_list) { | |
1026 | int estimated_bw, estimated_up, estimated_down; | |
1027 | struct tb_tunnel *tunnel; | |
1028 | struct tb_port *out; | |
1029 | ||
1030 | if (!usb4_dp_port_bw_mode_enabled(in)) | |
1031 | continue; | |
1032 | ||
1033 | tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL); | |
1034 | if (WARN_ON(!tunnel)) | |
1035 | break; | |
1036 | ||
1037 | if (!first_tunnel) { | |
1038 | /* | |
1039 | * Since USB3 bandwidth is shared by all DP | |
1040 | * tunnels under the host router USB4 port, even | |
1041 | * if they do not begin from the host router, we | |
1042 | * can release USB3 bandwidth just once and not | |
1043 | * for each tunnel separately. | |
1044 | */ | |
1045 | first_tunnel = tunnel; | |
1046 | ret = tb_release_unused_usb3_bandwidth(tb, | |
1047 | first_tunnel->src_port, first_tunnel->dst_port); | |
1048 | if (ret) { | |
1049 | tb_port_warn(in, | |
1050 | "failed to release unused bandwidth\n"); | |
1051 | break; | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | out = tunnel->dst_port; | |
1056 | ret = tb_available_bandwidth(tb, in, out, &estimated_up, | |
1057 | &estimated_down); | |
1058 | if (ret) { | |
1059 | tb_port_warn(in, | |
1060 | "failed to re-calculate estimated bandwidth\n"); | |
1061 | break; | |
1062 | } | |
1063 | ||
1064 | /* | |
1065 | * Estimated bandwidth includes: | |
1066 | * - already allocated bandwidth for the DP tunnel | |
1067 | * - available bandwidth along the path | |
1068 | * - bandwidth allocated for USB 3.x but not used. | |
1069 | */ | |
1070 | tb_port_dbg(in, "re-calculated estimated bandwidth %u/%u Mb/s\n", | |
1071 | estimated_up, estimated_down); | |
1072 | ||
1073 | if (in->sw->config.depth < out->sw->config.depth) | |
1074 | estimated_bw = estimated_down; | |
1075 | else | |
1076 | estimated_bw = estimated_up; | |
1077 | ||
1078 | if (usb4_dp_port_set_estimated_bw(in, estimated_bw)) | |
1079 | tb_port_warn(in, "failed to update estimated bandwidth\n"); | |
1080 | } | |
1081 | ||
1082 | if (first_tunnel) | |
1083 | tb_reclaim_usb3_bandwidth(tb, first_tunnel->src_port, | |
1084 | first_tunnel->dst_port); | |
1085 | ||
1086 | tb_dbg(tb, "bandwidth estimation for group %u done\n", group->index); | |
1087 | } | |
1088 | ||
1089 | static void tb_recalc_estimated_bandwidth(struct tb *tb) | |
1090 | { | |
1091 | struct tb_cm *tcm = tb_priv(tb); | |
1092 | int i; | |
1093 | ||
1094 | tb_dbg(tb, "bandwidth consumption changed, re-calculating estimated bandwidth\n"); | |
1095 | ||
1096 | for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { | |
1097 | struct tb_bandwidth_group *group = &tcm->groups[i]; | |
1098 | ||
1099 | if (!list_empty(&group->ports)) | |
1100 | tb_recalc_estimated_bandwidth_for_group(group); | |
1101 | } | |
1102 | ||
1103 | tb_dbg(tb, "bandwidth re-calculation done\n"); | |
1104 | } | |
1105 | ||
e876f34a MW |
1106 | static struct tb_port *tb_find_dp_out(struct tb *tb, struct tb_port *in) |
1107 | { | |
1108 | struct tb_port *host_port, *port; | |
1109 | struct tb_cm *tcm = tb_priv(tb); | |
1110 | ||
1111 | host_port = tb_route(in->sw) ? | |
1112 | tb_port_at(tb_route(in->sw), tb->root_switch) : NULL; | |
1113 | ||
1114 | list_for_each_entry(port, &tcm->dp_resources, list) { | |
1115 | if (!tb_port_is_dpout(port)) | |
1116 | continue; | |
1117 | ||
1118 | if (tb_port_is_enabled(port)) { | |
b0ef48fc | 1119 | tb_port_dbg(port, "DP OUT in use\n"); |
e876f34a MW |
1120 | continue; |
1121 | } | |
1122 | ||
1123 | tb_port_dbg(port, "DP OUT available\n"); | |
1124 | ||
1125 | /* | |
1126 | * Keep the DP tunnel under the topology starting from | |
1127 | * the same host router downstream port. | |
1128 | */ | |
1129 | if (host_port && tb_route(port->sw)) { | |
1130 | struct tb_port *p; | |
1131 | ||
1132 | p = tb_port_at(tb_route(port->sw), tb->root_switch); | |
1133 | if (p != host_port) | |
1134 | continue; | |
1135 | } | |
1136 | ||
1137 | return port; | |
1138 | } | |
1139 | ||
1140 | return NULL; | |
1141 | } | |
1142 | ||
8afe909b | 1143 | static void tb_tunnel_dp(struct tb *tb) |
4f807e47 | 1144 | { |
9d2d0a5c | 1145 | int available_up, available_down, ret, link_nr; |
4f807e47 | 1146 | struct tb_cm *tcm = tb_priv(tb); |
8afe909b | 1147 | struct tb_port *port, *in, *out; |
4f807e47 | 1148 | struct tb_tunnel *tunnel; |
4f807e47 | 1149 | |
c6da62a2 MW |
1150 | if (!tb_acpi_may_tunnel_dp()) { |
1151 | tb_dbg(tb, "DP tunneling disabled, not creating tunnel\n"); | |
1152 | return; | |
1153 | } | |
1154 | ||
8afe909b MW |
1155 | /* |
1156 | * Find pair of inactive DP IN and DP OUT adapters and then | |
1157 | * establish a DP tunnel between them. | |
1158 | */ | |
1159 | tb_dbg(tb, "looking for DP IN <-> DP OUT pairs:\n"); | |
1160 | ||
1161 | in = NULL; | |
1162 | out = NULL; | |
1163 | list_for_each_entry(port, &tcm->dp_resources, list) { | |
e876f34a MW |
1164 | if (!tb_port_is_dpin(port)) |
1165 | continue; | |
1166 | ||
8afe909b | 1167 | if (tb_port_is_enabled(port)) { |
b0ef48fc | 1168 | tb_port_dbg(port, "DP IN in use\n"); |
8afe909b MW |
1169 | continue; |
1170 | } | |
4f807e47 | 1171 | |
e876f34a | 1172 | tb_port_dbg(port, "DP IN available\n"); |
8afe909b | 1173 | |
e876f34a MW |
1174 | out = tb_find_dp_out(tb, port); |
1175 | if (out) { | |
8afe909b | 1176 | in = port; |
e876f34a MW |
1177 | break; |
1178 | } | |
8afe909b MW |
1179 | } |
1180 | ||
1181 | if (!in) { | |
1182 | tb_dbg(tb, "no suitable DP IN adapter available, not tunneling\n"); | |
1183 | return; | |
1184 | } | |
1185 | if (!out) { | |
1186 | tb_dbg(tb, "no suitable DP OUT adapter available, not tunneling\n"); | |
1187 | return; | |
1188 | } | |
1189 | ||
9d2d0a5c MW |
1190 | /* |
1191 | * This is only applicable to links that are not bonded (so | |
1192 | * when Thunderbolt 1 hardware is involved somewhere in the | |
1193 | * topology). For these try to share the DP bandwidth between | |
1194 | * the two lanes. | |
1195 | */ | |
1196 | link_nr = 1; | |
1197 | list_for_each_entry(tunnel, &tcm->tunnel_list, list) { | |
1198 | if (tb_tunnel_is_dp(tunnel)) { | |
1199 | link_nr = 0; | |
1200 | break; | |
1201 | } | |
1202 | } | |
1203 | ||
6ac6faee MW |
1204 | /* |
1205 | * DP stream needs the domain to be active so runtime resume | |
1206 | * both ends of the tunnel. | |
1207 | * | |
1208 | * This should bring the routers in the middle active as well | |
1209 | * and keeps the domain from runtime suspending while the DP | |
1210 | * tunnel is active. | |
1211 | */ | |
1212 | pm_runtime_get_sync(&in->sw->dev); | |
1213 | pm_runtime_get_sync(&out->sw->dev); | |
1214 | ||
8afe909b MW |
1215 | if (tb_switch_alloc_dp_resource(in->sw, in)) { |
1216 | tb_port_dbg(in, "no resource available for DP IN, not tunneling\n"); | |
6ac6faee | 1217 | goto err_rpm_put; |
8afe909b | 1218 | } |
4f807e47 | 1219 | |
6ce35635 MW |
1220 | if (!tb_attach_bandwidth_group(tcm, in, out)) |
1221 | goto err_dealloc_dp; | |
1222 | ||
0bd680cd MW |
1223 | /* Make all unused USB3 bandwidth available for the new DP tunnel */ |
1224 | ret = tb_release_unused_usb3_bandwidth(tb, in, out); | |
1225 | if (ret) { | |
1226 | tb_warn(tb, "failed to release unused bandwidth\n"); | |
6ce35635 | 1227 | goto err_detach_group; |
a11b88ad MW |
1228 | } |
1229 | ||
6ce35635 | 1230 | ret = tb_available_bandwidth(tb, in, out, &available_up, &available_down); |
0bd680cd | 1231 | if (ret) |
6ce35635 | 1232 | goto err_reclaim_usb; |
0bd680cd MW |
1233 | |
1234 | tb_dbg(tb, "available bandwidth for new DP tunnel %u/%u Mb/s\n", | |
1235 | available_up, available_down); | |
a11b88ad | 1236 | |
9d2d0a5c MW |
1237 | tunnel = tb_tunnel_alloc_dp(tb, in, out, link_nr, available_up, |
1238 | available_down); | |
4f807e47 | 1239 | if (!tunnel) { |
8afe909b | 1240 | tb_port_dbg(out, "could not allocate DP tunnel\n"); |
6ce35635 | 1241 | goto err_reclaim_usb; |
4f807e47 MW |
1242 | } |
1243 | ||
1244 | if (tb_tunnel_activate(tunnel)) { | |
1245 | tb_port_info(out, "DP tunnel activation failed, aborting\n"); | |
0bd680cd | 1246 | goto err_free; |
4f807e47 MW |
1247 | } |
1248 | ||
1249 | list_add_tail(&tunnel->list, &tcm->tunnel_list); | |
0bd680cd | 1250 | tb_reclaim_usb3_bandwidth(tb, in, out); |
6ce35635 MW |
1251 | |
1252 | /* Update the domain with the new bandwidth estimation */ | |
1253 | tb_recalc_estimated_bandwidth(tb); | |
1254 | ||
3084b48f GF |
1255 | /* |
1256 | * In case of DP tunnel exists, change host router's 1st children | |
1257 | * TMU mode to HiFi for CL0s to work. | |
1258 | */ | |
1259 | tb_switch_enable_tmu_1st_child(tb->root_switch, TB_SWITCH_TMU_RATE_HIFI); | |
1260 | ||
8afe909b MW |
1261 | return; |
1262 | ||
0bd680cd MW |
1263 | err_free: |
1264 | tb_tunnel_free(tunnel); | |
6ce35635 | 1265 | err_reclaim_usb: |
0bd680cd | 1266 | tb_reclaim_usb3_bandwidth(tb, in, out); |
6ce35635 MW |
1267 | err_detach_group: |
1268 | tb_detach_bandwidth_group(in); | |
0bd680cd | 1269 | err_dealloc_dp: |
8afe909b | 1270 | tb_switch_dealloc_dp_resource(in->sw, in); |
6ac6faee MW |
1271 | err_rpm_put: |
1272 | pm_runtime_mark_last_busy(&out->sw->dev); | |
1273 | pm_runtime_put_autosuspend(&out->sw->dev); | |
1274 | pm_runtime_mark_last_busy(&in->sw->dev); | |
1275 | pm_runtime_put_autosuspend(&in->sw->dev); | |
4f807e47 MW |
1276 | } |
1277 | ||
8afe909b | 1278 | static void tb_dp_resource_unavailable(struct tb *tb, struct tb_port *port) |
4f807e47 | 1279 | { |
8afe909b MW |
1280 | struct tb_port *in, *out; |
1281 | struct tb_tunnel *tunnel; | |
1282 | ||
1283 | if (tb_port_is_dpin(port)) { | |
1284 | tb_port_dbg(port, "DP IN resource unavailable\n"); | |
1285 | in = port; | |
1286 | out = NULL; | |
1287 | } else { | |
1288 | tb_port_dbg(port, "DP OUT resource unavailable\n"); | |
1289 | in = NULL; | |
1290 | out = port; | |
1291 | } | |
1292 | ||
1293 | tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, out); | |
1294 | tb_deactivate_and_free_tunnel(tunnel); | |
1295 | list_del_init(&port->list); | |
1296 | ||
1297 | /* | |
1298 | * See if there is another DP OUT port that can be used for | |
1299 | * to create another tunnel. | |
1300 | */ | |
6ce35635 | 1301 | tb_recalc_estimated_bandwidth(tb); |
8afe909b MW |
1302 | tb_tunnel_dp(tb); |
1303 | } | |
1304 | ||
1305 | static void tb_dp_resource_available(struct tb *tb, struct tb_port *port) | |
1306 | { | |
1307 | struct tb_cm *tcm = tb_priv(tb); | |
1308 | struct tb_port *p; | |
1309 | ||
1310 | if (tb_port_is_enabled(port)) | |
1311 | return; | |
1312 | ||
1313 | list_for_each_entry(p, &tcm->dp_resources, list) { | |
1314 | if (p == port) | |
1315 | return; | |
1316 | } | |
1317 | ||
1318 | tb_port_dbg(port, "DP %s resource available\n", | |
1319 | tb_port_is_dpin(port) ? "IN" : "OUT"); | |
1320 | list_add_tail(&port->list, &tcm->dp_resources); | |
1321 | ||
1322 | /* Look for suitable DP IN <-> DP OUT pairs now */ | |
1323 | tb_tunnel_dp(tb); | |
4f807e47 MW |
1324 | } |
1325 | ||
81a2e3e4 MW |
1326 | static void tb_disconnect_and_release_dp(struct tb *tb) |
1327 | { | |
1328 | struct tb_cm *tcm = tb_priv(tb); | |
1329 | struct tb_tunnel *tunnel, *n; | |
1330 | ||
1331 | /* | |
1332 | * Tear down all DP tunnels and release their resources. They | |
1333 | * will be re-established after resume based on plug events. | |
1334 | */ | |
1335 | list_for_each_entry_safe_reverse(tunnel, n, &tcm->tunnel_list, list) { | |
1336 | if (tb_tunnel_is_dp(tunnel)) | |
1337 | tb_deactivate_and_free_tunnel(tunnel); | |
1338 | } | |
1339 | ||
1340 | while (!list_empty(&tcm->dp_resources)) { | |
1341 | struct tb_port *port; | |
1342 | ||
1343 | port = list_first_entry(&tcm->dp_resources, | |
1344 | struct tb_port, list); | |
1345 | list_del_init(&port->list); | |
1346 | } | |
1347 | } | |
1348 | ||
3da88be2 MW |
1349 | static int tb_disconnect_pci(struct tb *tb, struct tb_switch *sw) |
1350 | { | |
1351 | struct tb_tunnel *tunnel; | |
1352 | struct tb_port *up; | |
1353 | ||
1354 | up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP); | |
1355 | if (WARN_ON(!up)) | |
1356 | return -ENODEV; | |
1357 | ||
1358 | tunnel = tb_find_tunnel(tb, TB_TUNNEL_PCI, NULL, up); | |
1359 | if (WARN_ON(!tunnel)) | |
1360 | return -ENODEV; | |
1361 | ||
30a4eca6 MW |
1362 | tb_switch_xhci_disconnect(sw); |
1363 | ||
3da88be2 MW |
1364 | tb_tunnel_deactivate(tunnel); |
1365 | list_del(&tunnel->list); | |
1366 | tb_tunnel_free(tunnel); | |
1367 | return 0; | |
1368 | } | |
1369 | ||
99cabbb0 MW |
1370 | static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw) |
1371 | { | |
1372 | struct tb_port *up, *down, *port; | |
1373 | struct tb_cm *tcm = tb_priv(tb); | |
1374 | struct tb_switch *parent_sw; | |
1375 | struct tb_tunnel *tunnel; | |
3364f0c1 | 1376 | |
386e5e29 | 1377 | up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP); |
99cabbb0 MW |
1378 | if (!up) |
1379 | return 0; | |
3364f0c1 | 1380 | |
99cabbb0 MW |
1381 | /* |
1382 | * Look up available down port. Since we are chaining it should | |
1383 | * be found right above this switch. | |
1384 | */ | |
1385 | parent_sw = tb_to_switch(sw->dev.parent); | |
1386 | port = tb_port_at(tb_route(sw), parent_sw); | |
1387 | down = tb_find_pcie_down(parent_sw, port); | |
1388 | if (!down) | |
1389 | return 0; | |
1390 | ||
1391 | tunnel = tb_tunnel_alloc_pci(tb, up, down); | |
1392 | if (!tunnel) | |
1393 | return -ENOMEM; | |
1394 | ||
1395 | if (tb_tunnel_activate(tunnel)) { | |
1396 | tb_port_info(up, | |
1397 | "PCIe tunnel activation failed, aborting\n"); | |
1398 | tb_tunnel_free(tunnel); | |
1399 | return -EIO; | |
3364f0c1 | 1400 | } |
99cabbb0 | 1401 | |
43f977bc GF |
1402 | /* |
1403 | * PCIe L1 is needed to enable CL0s for Titan Ridge so enable it | |
1404 | * here. | |
1405 | */ | |
1406 | if (tb_switch_pcie_l1_enable(sw)) | |
1407 | tb_sw_warn(sw, "failed to enable PCIe L1 for Titan Ridge\n"); | |
1408 | ||
30a4eca6 MW |
1409 | if (tb_switch_xhci_connect(sw)) |
1410 | tb_sw_warn(sw, "failed to connect xHCI\n"); | |
1411 | ||
99cabbb0 MW |
1412 | list_add_tail(&tunnel->list, &tcm->tunnel_list); |
1413 | return 0; | |
3364f0c1 | 1414 | } |
9da672a4 | 1415 | |
180b0689 MW |
1416 | static int tb_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, |
1417 | int transmit_path, int transmit_ring, | |
1418 | int receive_path, int receive_ring) | |
7ea4cd6b MW |
1419 | { |
1420 | struct tb_cm *tcm = tb_priv(tb); | |
1421 | struct tb_port *nhi_port, *dst_port; | |
1422 | struct tb_tunnel *tunnel; | |
1423 | struct tb_switch *sw; | |
1424 | ||
1425 | sw = tb_to_switch(xd->dev.parent); | |
1426 | dst_port = tb_port_at(xd->route, sw); | |
386e5e29 | 1427 | nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); |
7ea4cd6b MW |
1428 | |
1429 | mutex_lock(&tb->lock); | |
180b0689 MW |
1430 | tunnel = tb_tunnel_alloc_dma(tb, nhi_port, dst_port, transmit_path, |
1431 | transmit_ring, receive_path, receive_ring); | |
7ea4cd6b MW |
1432 | if (!tunnel) { |
1433 | mutex_unlock(&tb->lock); | |
1434 | return -ENOMEM; | |
1435 | } | |
1436 | ||
1437 | if (tb_tunnel_activate(tunnel)) { | |
1438 | tb_port_info(nhi_port, | |
1439 | "DMA tunnel activation failed, aborting\n"); | |
1440 | tb_tunnel_free(tunnel); | |
1441 | mutex_unlock(&tb->lock); | |
1442 | return -EIO; | |
1443 | } | |
1444 | ||
1445 | list_add_tail(&tunnel->list, &tcm->tunnel_list); | |
1446 | mutex_unlock(&tb->lock); | |
1447 | return 0; | |
1448 | } | |
1449 | ||
180b0689 MW |
1450 | static void __tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, |
1451 | int transmit_path, int transmit_ring, | |
1452 | int receive_path, int receive_ring) | |
7ea4cd6b | 1453 | { |
180b0689 MW |
1454 | struct tb_cm *tcm = tb_priv(tb); |
1455 | struct tb_port *nhi_port, *dst_port; | |
1456 | struct tb_tunnel *tunnel, *n; | |
7ea4cd6b MW |
1457 | struct tb_switch *sw; |
1458 | ||
1459 | sw = tb_to_switch(xd->dev.parent); | |
1460 | dst_port = tb_port_at(xd->route, sw); | |
180b0689 | 1461 | nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); |
7ea4cd6b | 1462 | |
180b0689 MW |
1463 | list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { |
1464 | if (!tb_tunnel_is_dma(tunnel)) | |
1465 | continue; | |
1466 | if (tunnel->src_port != nhi_port || tunnel->dst_port != dst_port) | |
1467 | continue; | |
1468 | ||
1469 | if (tb_tunnel_match_dma(tunnel, transmit_path, transmit_ring, | |
1470 | receive_path, receive_ring)) | |
1471 | tb_deactivate_and_free_tunnel(tunnel); | |
1472 | } | |
7ea4cd6b MW |
1473 | } |
1474 | ||
180b0689 MW |
1475 | static int tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, |
1476 | int transmit_path, int transmit_ring, | |
1477 | int receive_path, int receive_ring) | |
7ea4cd6b MW |
1478 | { |
1479 | if (!xd->is_unplugged) { | |
1480 | mutex_lock(&tb->lock); | |
180b0689 MW |
1481 | __tb_disconnect_xdomain_paths(tb, xd, transmit_path, |
1482 | transmit_ring, receive_path, | |
1483 | receive_ring); | |
7ea4cd6b MW |
1484 | mutex_unlock(&tb->lock); |
1485 | } | |
1486 | return 0; | |
1487 | } | |
1488 | ||
d6cc51cd AN |
1489 | /* hotplug handling */ |
1490 | ||
877e50b3 | 1491 | /* |
d6cc51cd AN |
1492 | * tb_handle_hotplug() - handle hotplug event |
1493 | * | |
1494 | * Executes on tb->wq. | |
1495 | */ | |
1496 | static void tb_handle_hotplug(struct work_struct *work) | |
1497 | { | |
1498 | struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); | |
1499 | struct tb *tb = ev->tb; | |
9d3cce0b | 1500 | struct tb_cm *tcm = tb_priv(tb); |
053596d9 AN |
1501 | struct tb_switch *sw; |
1502 | struct tb_port *port; | |
284652a4 | 1503 | |
6ac6faee MW |
1504 | /* Bring the domain back from sleep if it was suspended */ |
1505 | pm_runtime_get_sync(&tb->dev); | |
1506 | ||
d6cc51cd | 1507 | mutex_lock(&tb->lock); |
9d3cce0b | 1508 | if (!tcm->hotplug_active) |
d6cc51cd AN |
1509 | goto out; /* during init, suspend or shutdown */ |
1510 | ||
8f965efd | 1511 | sw = tb_switch_find_by_route(tb, ev->route); |
053596d9 AN |
1512 | if (!sw) { |
1513 | tb_warn(tb, | |
1514 | "hotplug event from non existent switch %llx:%x (unplug: %d)\n", | |
1515 | ev->route, ev->port, ev->unplug); | |
1516 | goto out; | |
1517 | } | |
1518 | if (ev->port > sw->config.max_port_number) { | |
1519 | tb_warn(tb, | |
1520 | "hotplug event from non existent port %llx:%x (unplug: %d)\n", | |
1521 | ev->route, ev->port, ev->unplug); | |
8f965efd | 1522 | goto put_sw; |
053596d9 AN |
1523 | } |
1524 | port = &sw->ports[ev->port]; | |
1525 | if (tb_is_upstream_port(port)) { | |
dfe40ca4 MW |
1526 | tb_dbg(tb, "hotplug event for upstream port %llx:%x (unplug: %d)\n", |
1527 | ev->route, ev->port, ev->unplug); | |
8f965efd | 1528 | goto put_sw; |
053596d9 | 1529 | } |
6ac6faee MW |
1530 | |
1531 | pm_runtime_get_sync(&sw->dev); | |
1532 | ||
053596d9 | 1533 | if (ev->unplug) { |
dacb1287 KK |
1534 | tb_retimer_remove_all(port); |
1535 | ||
dfe40ca4 | 1536 | if (tb_port_has_remote(port)) { |
7ea4cd6b | 1537 | tb_port_dbg(port, "switch unplugged\n"); |
aae20bb6 | 1538 | tb_sw_set_unplugged(port->remote->sw); |
3364f0c1 | 1539 | tb_free_invalid_tunnels(tb); |
8afe909b | 1540 | tb_remove_dp_resources(port->remote->sw); |
cf29b9af | 1541 | tb_switch_tmu_disable(port->remote->sw); |
de462039 | 1542 | tb_switch_unconfigure_link(port->remote->sw); |
91c0c120 | 1543 | tb_switch_lane_bonding_disable(port->remote->sw); |
bfe778ac | 1544 | tb_switch_remove(port->remote->sw); |
053596d9 | 1545 | port->remote = NULL; |
dfe40ca4 MW |
1546 | if (port->dual_link_port) |
1547 | port->dual_link_port->remote = NULL; | |
8afe909b | 1548 | /* Maybe we can create another DP tunnel */ |
6ce35635 | 1549 | tb_recalc_estimated_bandwidth(tb); |
8afe909b | 1550 | tb_tunnel_dp(tb); |
7ea4cd6b MW |
1551 | } else if (port->xdomain) { |
1552 | struct tb_xdomain *xd = tb_xdomain_get(port->xdomain); | |
1553 | ||
1554 | tb_port_dbg(port, "xdomain unplugged\n"); | |
1555 | /* | |
1556 | * Service drivers are unbound during | |
1557 | * tb_xdomain_remove() so setting XDomain as | |
1558 | * unplugged here prevents deadlock if they call | |
1559 | * tb_xdomain_disable_paths(). We will tear down | |
180b0689 | 1560 | * all the tunnels below. |
7ea4cd6b MW |
1561 | */ |
1562 | xd->is_unplugged = true; | |
1563 | tb_xdomain_remove(xd); | |
1564 | port->xdomain = NULL; | |
180b0689 | 1565 | __tb_disconnect_xdomain_paths(tb, xd, -1, -1, -1, -1); |
7ea4cd6b | 1566 | tb_xdomain_put(xd); |
284652a4 | 1567 | tb_port_unconfigure_xdomain(port); |
8afe909b MW |
1568 | } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { |
1569 | tb_dp_resource_unavailable(tb, port); | |
30a4eca6 MW |
1570 | } else if (!port->port) { |
1571 | tb_sw_dbg(sw, "xHCI disconnect request\n"); | |
1572 | tb_switch_xhci_disconnect(sw); | |
053596d9 | 1573 | } else { |
62efe699 MW |
1574 | tb_port_dbg(port, |
1575 | "got unplug event for disconnected port, ignoring\n"); | |
053596d9 AN |
1576 | } |
1577 | } else if (port->remote) { | |
62efe699 | 1578 | tb_port_dbg(port, "got plug event for connected port, ignoring\n"); |
30a4eca6 MW |
1579 | } else if (!port->port && sw->authorized) { |
1580 | tb_sw_dbg(sw, "xHCI connect request\n"); | |
1581 | tb_switch_xhci_connect(sw); | |
053596d9 | 1582 | } else { |
344e0643 | 1583 | if (tb_port_is_null(port)) { |
62efe699 | 1584 | tb_port_dbg(port, "hotplug: scanning\n"); |
344e0643 MW |
1585 | tb_scan_port(port); |
1586 | if (!port->remote) | |
62efe699 | 1587 | tb_port_dbg(port, "hotplug: no switch found\n"); |
8afe909b MW |
1588 | } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { |
1589 | tb_dp_resource_available(tb, port); | |
344e0643 | 1590 | } |
053596d9 | 1591 | } |
8f965efd | 1592 | |
6ac6faee MW |
1593 | pm_runtime_mark_last_busy(&sw->dev); |
1594 | pm_runtime_put_autosuspend(&sw->dev); | |
1595 | ||
8f965efd MW |
1596 | put_sw: |
1597 | tb_switch_put(sw); | |
d6cc51cd AN |
1598 | out: |
1599 | mutex_unlock(&tb->lock); | |
6ac6faee MW |
1600 | |
1601 | pm_runtime_mark_last_busy(&tb->dev); | |
1602 | pm_runtime_put_autosuspend(&tb->dev); | |
1603 | ||
d6cc51cd AN |
1604 | kfree(ev); |
1605 | } | |
1606 | ||
6ce35635 MW |
1607 | static int tb_alloc_dp_bandwidth(struct tb_tunnel *tunnel, int *requested_up, |
1608 | int *requested_down) | |
1609 | { | |
1610 | int allocated_up, allocated_down, available_up, available_down, ret; | |
1611 | int requested_up_corrected, requested_down_corrected, granularity; | |
1612 | int max_up, max_down, max_up_rounded, max_down_rounded; | |
1613 | struct tb *tb = tunnel->tb; | |
1614 | struct tb_port *in, *out; | |
1615 | ||
1616 | ret = tb_tunnel_allocated_bandwidth(tunnel, &allocated_up, &allocated_down); | |
1617 | if (ret) | |
1618 | return ret; | |
1619 | ||
1620 | in = tunnel->src_port; | |
1621 | out = tunnel->dst_port; | |
1622 | ||
1623 | tb_port_dbg(in, "bandwidth allocated currently %d/%d Mb/s\n", | |
1624 | allocated_up, allocated_down); | |
1625 | ||
1626 | /* | |
1627 | * If we get rounded up request from graphics side, say HBR2 x 4 | |
1628 | * that is 17500 instead of 17280 (this is because of the | |
1629 | * granularity), we allow it too. Here the graphics has already | |
1630 | * negotiated with the DPRX the maximum possible rates (which is | |
1631 | * 17280 in this case). | |
1632 | * | |
1633 | * Since the link cannot go higher than 17280 we use that in our | |
1634 | * calculations but the DP IN adapter Allocated BW write must be | |
1635 | * the same value (17500) otherwise the adapter will mark it as | |
1636 | * failed for graphics. | |
1637 | */ | |
1638 | ret = tb_tunnel_maximum_bandwidth(tunnel, &max_up, &max_down); | |
1639 | if (ret) | |
1640 | return ret; | |
1641 | ||
1642 | ret = usb4_dp_port_granularity(in); | |
1643 | if (ret < 0) | |
1644 | return ret; | |
1645 | granularity = ret; | |
1646 | ||
1647 | max_up_rounded = roundup(max_up, granularity); | |
1648 | max_down_rounded = roundup(max_down, granularity); | |
1649 | ||
1650 | /* | |
1651 | * This will "fix" the request down to the maximum supported | |
1652 | * rate * lanes if it is at the maximum rounded up level. | |
1653 | */ | |
1654 | requested_up_corrected = *requested_up; | |
1655 | if (requested_up_corrected == max_up_rounded) | |
1656 | requested_up_corrected = max_up; | |
1657 | else if (requested_up_corrected < 0) | |
1658 | requested_up_corrected = 0; | |
1659 | requested_down_corrected = *requested_down; | |
1660 | if (requested_down_corrected == max_down_rounded) | |
1661 | requested_down_corrected = max_down; | |
1662 | else if (requested_down_corrected < 0) | |
1663 | requested_down_corrected = 0; | |
1664 | ||
1665 | tb_port_dbg(in, "corrected bandwidth request %d/%d Mb/s\n", | |
1666 | requested_up_corrected, requested_down_corrected); | |
1667 | ||
1668 | if ((*requested_up >= 0 && requested_up_corrected > max_up_rounded) || | |
1669 | (*requested_down >= 0 && requested_down_corrected > max_down_rounded)) { | |
1670 | tb_port_dbg(in, "bandwidth request too high (%d/%d Mb/s > %d/%d Mb/s)\n", | |
1671 | requested_up_corrected, requested_down_corrected, | |
1672 | max_up_rounded, max_down_rounded); | |
1673 | return -ENOBUFS; | |
1674 | } | |
1675 | ||
1676 | if ((*requested_up >= 0 && requested_up_corrected <= allocated_up) || | |
1677 | (*requested_down >= 0 && requested_down_corrected <= allocated_down)) { | |
1678 | /* | |
1679 | * If requested bandwidth is less or equal than what is | |
1680 | * currently allocated to that tunnel we simply change | |
1681 | * the reservation of the tunnel. Since all the tunnels | |
1682 | * going out from the same USB4 port are in the same | |
1683 | * group the released bandwidth will be taken into | |
1684 | * account for the other tunnels automatically below. | |
1685 | */ | |
1686 | return tb_tunnel_alloc_bandwidth(tunnel, requested_up, | |
1687 | requested_down); | |
1688 | } | |
1689 | ||
1690 | /* | |
1691 | * More bandwidth is requested. Release all the potential | |
1692 | * bandwidth from USB3 first. | |
1693 | */ | |
1694 | ret = tb_release_unused_usb3_bandwidth(tb, in, out); | |
1695 | if (ret) | |
1696 | return ret; | |
1697 | ||
1698 | /* | |
1699 | * Then go over all tunnels that cross the same USB4 ports (they | |
1700 | * are also in the same group but we use the same function here | |
1701 | * that we use with the normal bandwidth allocation). | |
1702 | */ | |
1703 | ret = tb_available_bandwidth(tb, in, out, &available_up, &available_down); | |
1704 | if (ret) | |
1705 | goto reclaim; | |
1706 | ||
1707 | tb_port_dbg(in, "bandwidth available for allocation %d/%d Mb/s\n", | |
1708 | available_up, available_down); | |
1709 | ||
1710 | if ((*requested_up >= 0 && available_up >= requested_up_corrected) || | |
1711 | (*requested_down >= 0 && available_down >= requested_down_corrected)) { | |
1712 | ret = tb_tunnel_alloc_bandwidth(tunnel, requested_up, | |
1713 | requested_down); | |
1714 | } else { | |
1715 | ret = -ENOBUFS; | |
1716 | } | |
1717 | ||
1718 | reclaim: | |
1719 | tb_reclaim_usb3_bandwidth(tb, in, out); | |
1720 | return ret; | |
1721 | } | |
1722 | ||
1723 | static void tb_handle_dp_bandwidth_request(struct work_struct *work) | |
1724 | { | |
1725 | struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); | |
1726 | int requested_bw, requested_up, requested_down, ret; | |
1727 | struct tb_port *in, *out; | |
1728 | struct tb_tunnel *tunnel; | |
1729 | struct tb *tb = ev->tb; | |
1730 | struct tb_cm *tcm = tb_priv(tb); | |
1731 | struct tb_switch *sw; | |
1732 | ||
1733 | pm_runtime_get_sync(&tb->dev); | |
1734 | ||
1735 | mutex_lock(&tb->lock); | |
1736 | if (!tcm->hotplug_active) | |
1737 | goto unlock; | |
1738 | ||
1739 | sw = tb_switch_find_by_route(tb, ev->route); | |
1740 | if (!sw) { | |
1741 | tb_warn(tb, "bandwidth request from non-existent router %llx\n", | |
1742 | ev->route); | |
1743 | goto unlock; | |
1744 | } | |
1745 | ||
1746 | in = &sw->ports[ev->port]; | |
1747 | if (!tb_port_is_dpin(in)) { | |
1748 | tb_port_warn(in, "bandwidth request to non-DP IN adapter\n"); | |
1749 | goto unlock; | |
1750 | } | |
1751 | ||
1752 | tb_port_dbg(in, "handling bandwidth allocation request\n"); | |
1753 | ||
1754 | if (!usb4_dp_port_bw_mode_enabled(in)) { | |
1755 | tb_port_warn(in, "bandwidth allocation mode not enabled\n"); | |
1756 | goto unlock; | |
1757 | } | |
1758 | ||
ace75e18 MW |
1759 | ret = usb4_dp_port_requested_bw(in); |
1760 | if (ret < 0) { | |
1761 | if (ret == -ENODATA) | |
1762 | tb_port_dbg(in, "no bandwidth request active\n"); | |
1763 | else | |
1764 | tb_port_warn(in, "failed to read requested bandwidth\n"); | |
6ce35635 MW |
1765 | goto unlock; |
1766 | } | |
ace75e18 | 1767 | requested_bw = ret; |
6ce35635 MW |
1768 | |
1769 | tb_port_dbg(in, "requested bandwidth %d Mb/s\n", requested_bw); | |
1770 | ||
1771 | tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL); | |
1772 | if (!tunnel) { | |
1773 | tb_port_warn(in, "failed to find tunnel\n"); | |
1774 | goto unlock; | |
1775 | } | |
1776 | ||
1777 | out = tunnel->dst_port; | |
1778 | ||
1779 | if (in->sw->config.depth < out->sw->config.depth) { | |
1780 | requested_up = -1; | |
1781 | requested_down = requested_bw; | |
1782 | } else { | |
1783 | requested_up = requested_bw; | |
1784 | requested_down = -1; | |
1785 | } | |
1786 | ||
1787 | ret = tb_alloc_dp_bandwidth(tunnel, &requested_up, &requested_down); | |
1788 | if (ret) { | |
1789 | if (ret == -ENOBUFS) | |
1790 | tb_port_warn(in, "not enough bandwidth available\n"); | |
1791 | else | |
1792 | tb_port_warn(in, "failed to change bandwidth allocation\n"); | |
1793 | } else { | |
1794 | tb_port_dbg(in, "bandwidth allocation changed to %d/%d Mb/s\n", | |
1795 | requested_up, requested_down); | |
1796 | ||
1797 | /* Update other clients about the allocation change */ | |
1798 | tb_recalc_estimated_bandwidth(tb); | |
1799 | } | |
1800 | ||
1801 | unlock: | |
1802 | mutex_unlock(&tb->lock); | |
1803 | ||
1804 | pm_runtime_mark_last_busy(&tb->dev); | |
1805 | pm_runtime_put_autosuspend(&tb->dev); | |
1806 | } | |
1807 | ||
1808 | static void tb_queue_dp_bandwidth_request(struct tb *tb, u64 route, u8 port) | |
1809 | { | |
1810 | struct tb_hotplug_event *ev; | |
1811 | ||
1812 | ev = kmalloc(sizeof(*ev), GFP_KERNEL); | |
1813 | if (!ev) | |
1814 | return; | |
1815 | ||
1816 | ev->tb = tb; | |
1817 | ev->route = route; | |
1818 | ev->port = port; | |
1819 | INIT_WORK(&ev->work, tb_handle_dp_bandwidth_request); | |
1820 | queue_work(tb->wq, &ev->work); | |
1821 | } | |
1822 | ||
1823 | static void tb_handle_notification(struct tb *tb, u64 route, | |
1824 | const struct cfg_error_pkg *error) | |
1825 | { | |
1826 | if (tb_cfg_ack_notification(tb->ctl, route, error)) | |
1827 | tb_warn(tb, "could not ack notification on %llx\n", route); | |
1828 | ||
1829 | switch (error->error) { | |
1830 | case TB_CFG_ERROR_DP_BW: | |
1831 | tb_queue_dp_bandwidth_request(tb, route, error->port); | |
1832 | break; | |
1833 | ||
1834 | default: | |
1835 | /* Ack is enough */ | |
1836 | return; | |
1837 | } | |
1838 | } | |
1839 | ||
877e50b3 | 1840 | /* |
d6cc51cd AN |
1841 | * tb_schedule_hotplug_handler() - callback function for the control channel |
1842 | * | |
1843 | * Delegates to tb_handle_hotplug. | |
1844 | */ | |
81a54b5e MW |
1845 | static void tb_handle_event(struct tb *tb, enum tb_cfg_pkg_type type, |
1846 | const void *buf, size_t size) | |
d6cc51cd | 1847 | { |
81a54b5e | 1848 | const struct cfg_event_pkg *pkg = buf; |
6ce35635 | 1849 | u64 route = tb_cfg_get_route(&pkg->header); |
81a54b5e | 1850 | |
6ce35635 MW |
1851 | switch (type) { |
1852 | case TB_CFG_PKG_ERROR: | |
1853 | tb_handle_notification(tb, route, (const struct cfg_error_pkg *)buf); | |
1854 | return; | |
1855 | case TB_CFG_PKG_EVENT: | |
1856 | break; | |
1857 | default: | |
81a54b5e MW |
1858 | tb_warn(tb, "unexpected event %#x, ignoring\n", type); |
1859 | return; | |
1860 | } | |
1861 | ||
210e9f56 | 1862 | if (tb_cfg_ack_plug(tb->ctl, route, pkg->port, pkg->unplug)) { |
81a54b5e MW |
1863 | tb_warn(tb, "could not ack plug event on %llx:%x\n", route, |
1864 | pkg->port); | |
1865 | } | |
1866 | ||
4f807e47 | 1867 | tb_queue_hotplug(tb, route, pkg->port, pkg->unplug); |
d6cc51cd AN |
1868 | } |
1869 | ||
9d3cce0b | 1870 | static void tb_stop(struct tb *tb) |
d6cc51cd | 1871 | { |
9d3cce0b | 1872 | struct tb_cm *tcm = tb_priv(tb); |
93f36ade MW |
1873 | struct tb_tunnel *tunnel; |
1874 | struct tb_tunnel *n; | |
3364f0c1 | 1875 | |
6ac6faee | 1876 | cancel_delayed_work(&tcm->remove_work); |
3364f0c1 | 1877 | /* tunnels are only present after everything has been initialized */ |
7ea4cd6b MW |
1878 | list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { |
1879 | /* | |
1880 | * DMA tunnels require the driver to be functional so we | |
1881 | * tear them down. Other protocol tunnels can be left | |
1882 | * intact. | |
1883 | */ | |
1884 | if (tb_tunnel_is_dma(tunnel)) | |
1885 | tb_tunnel_deactivate(tunnel); | |
93f36ade | 1886 | tb_tunnel_free(tunnel); |
7ea4cd6b | 1887 | } |
bfe778ac | 1888 | tb_switch_remove(tb->root_switch); |
9d3cce0b | 1889 | tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ |
d6cc51cd AN |
1890 | } |
1891 | ||
99cabbb0 MW |
1892 | static int tb_scan_finalize_switch(struct device *dev, void *data) |
1893 | { | |
1894 | if (tb_is_switch(dev)) { | |
1895 | struct tb_switch *sw = tb_to_switch(dev); | |
1896 | ||
1897 | /* | |
1898 | * If we found that the switch was already setup by the | |
1899 | * boot firmware, mark it as authorized now before we | |
1900 | * send uevent to userspace. | |
1901 | */ | |
1902 | if (sw->boot) | |
1903 | sw->authorized = 1; | |
1904 | ||
1905 | dev_set_uevent_suppress(dev, false); | |
1906 | kobject_uevent(&dev->kobj, KOBJ_ADD); | |
1907 | device_for_each_child(dev, NULL, tb_scan_finalize_switch); | |
1908 | } | |
1909 | ||
1910 | return 0; | |
1911 | } | |
1912 | ||
9d3cce0b | 1913 | static int tb_start(struct tb *tb) |
d6cc51cd | 1914 | { |
9d3cce0b | 1915 | struct tb_cm *tcm = tb_priv(tb); |
bfe778ac | 1916 | int ret; |
d6cc51cd | 1917 | |
bfe778ac | 1918 | tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0); |
444ac384 MW |
1919 | if (IS_ERR(tb->root_switch)) |
1920 | return PTR_ERR(tb->root_switch); | |
a25c8b2f | 1921 | |
e6b245cc MW |
1922 | /* |
1923 | * ICM firmware upgrade needs running firmware and in native | |
1924 | * mode that is not available so disable firmware upgrade of the | |
1925 | * root switch. | |
5172eb9a SC |
1926 | * |
1927 | * However, USB4 routers support NVM firmware upgrade if they | |
1928 | * implement the necessary router operations. | |
e6b245cc | 1929 | */ |
5172eb9a | 1930 | tb->root_switch->no_nvm_upgrade = !tb_switch_is_usb4(tb->root_switch); |
6ac6faee MW |
1931 | /* All USB4 routers support runtime PM */ |
1932 | tb->root_switch->rpm = tb_switch_is_usb4(tb->root_switch); | |
e6b245cc | 1933 | |
bfe778ac MW |
1934 | ret = tb_switch_configure(tb->root_switch); |
1935 | if (ret) { | |
1936 | tb_switch_put(tb->root_switch); | |
1937 | return ret; | |
1938 | } | |
1939 | ||
1940 | /* Announce the switch to the world */ | |
1941 | ret = tb_switch_add(tb->root_switch); | |
1942 | if (ret) { | |
1943 | tb_switch_put(tb->root_switch); | |
1944 | return ret; | |
1945 | } | |
1946 | ||
b017a46d GF |
1947 | /* |
1948 | * To support highest CLx state, we set host router's TMU to | |
1949 | * Normal mode. | |
1950 | */ | |
1951 | tb_switch_tmu_configure(tb->root_switch, TB_SWITCH_TMU_RATE_NORMAL, | |
1952 | false); | |
cf29b9af RM |
1953 | /* Enable TMU if it is off */ |
1954 | tb_switch_tmu_enable(tb->root_switch); | |
9da672a4 AN |
1955 | /* Full scan to discover devices added before the driver was loaded. */ |
1956 | tb_scan_switch(tb->root_switch); | |
0414bec5 | 1957 | /* Find out tunnels created by the boot firmware */ |
43bddb26 | 1958 | tb_discover_tunnels(tb); |
b60e31bf SM |
1959 | /* Add DP resources from the DP tunnels created by the boot firmware */ |
1960 | tb_discover_dp_resources(tb); | |
e6f81858 RM |
1961 | /* |
1962 | * If the boot firmware did not create USB 3.x tunnels create them | |
1963 | * now for the whole topology. | |
1964 | */ | |
1965 | tb_create_usb3_tunnels(tb->root_switch); | |
8afe909b MW |
1966 | /* Add DP IN resources for the root switch */ |
1967 | tb_add_dp_resources(tb->root_switch); | |
99cabbb0 MW |
1968 | /* Make the discovered switches available to the userspace */ |
1969 | device_for_each_child(&tb->root_switch->dev, NULL, | |
1970 | tb_scan_finalize_switch); | |
9da672a4 | 1971 | |
d6cc51cd | 1972 | /* Allow tb_handle_hotplug to progress events */ |
9d3cce0b MW |
1973 | tcm->hotplug_active = true; |
1974 | return 0; | |
d6cc51cd AN |
1975 | } |
1976 | ||
9d3cce0b | 1977 | static int tb_suspend_noirq(struct tb *tb) |
23dd5bb4 | 1978 | { |
9d3cce0b MW |
1979 | struct tb_cm *tcm = tb_priv(tb); |
1980 | ||
daa5140f | 1981 | tb_dbg(tb, "suspending...\n"); |
81a2e3e4 | 1982 | tb_disconnect_and_release_dp(tb); |
6ac6faee | 1983 | tb_switch_suspend(tb->root_switch, false); |
9d3cce0b | 1984 | tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ |
daa5140f | 1985 | tb_dbg(tb, "suspend finished\n"); |
9d3cce0b MW |
1986 | |
1987 | return 0; | |
23dd5bb4 AN |
1988 | } |
1989 | ||
91c0c120 MW |
1990 | static void tb_restore_children(struct tb_switch *sw) |
1991 | { | |
1992 | struct tb_port *port; | |
990f4b85 | 1993 | int ret; |
91c0c120 | 1994 | |
6ac6faee MW |
1995 | /* No need to restore if the router is already unplugged */ |
1996 | if (sw->is_unplugged) | |
1997 | return; | |
1998 | ||
a28ec0e1 | 1999 | /* |
b017a46d GF |
2000 | * CL0s and CL1 are enabled and supported together. |
2001 | * Silently ignore CLx re-enabling in case CLx is not supported. | |
a28ec0e1 | 2002 | */ |
b017a46d GF |
2003 | ret = tb_switch_enable_clx(sw, TB_CL1); |
2004 | if (ret && ret != -EOPNOTSUPP) | |
2005 | tb_sw_warn(sw, "failed to re-enable %s on upstream port\n", | |
2006 | tb_switch_clx_name(TB_CL1)); | |
2007 | ||
2008 | if (tb_switch_is_clx_enabled(sw, TB_CL1)) | |
2009 | /* | |
2010 | * To support highest CLx state, we set router's TMU to | |
2011 | * Normal-Uni mode. | |
2012 | */ | |
2013 | tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_NORMAL, true); | |
2014 | else | |
2015 | /* If CLx disabled, configure router's TMU to HiFi-Bidir mode*/ | |
2016 | tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, false); | |
2017 | ||
cf29b9af RM |
2018 | if (tb_enable_tmu(sw)) |
2019 | tb_sw_warn(sw, "failed to restore TMU configuration\n"); | |
2020 | ||
91c0c120 | 2021 | tb_switch_for_each_port(sw, port) { |
284652a4 | 2022 | if (!tb_port_has_remote(port) && !port->xdomain) |
91c0c120 MW |
2023 | continue; |
2024 | ||
284652a4 MW |
2025 | if (port->remote) { |
2026 | tb_switch_lane_bonding_enable(port->remote->sw); | |
2027 | tb_switch_configure_link(port->remote->sw); | |
91c0c120 | 2028 | |
284652a4 MW |
2029 | tb_restore_children(port->remote->sw); |
2030 | } else if (port->xdomain) { | |
f9cad07b | 2031 | tb_port_configure_xdomain(port, port->xdomain); |
284652a4 | 2032 | } |
91c0c120 MW |
2033 | } |
2034 | } | |
2035 | ||
9d3cce0b | 2036 | static int tb_resume_noirq(struct tb *tb) |
23dd5bb4 | 2037 | { |
9d3cce0b | 2038 | struct tb_cm *tcm = tb_priv(tb); |
93f36ade | 2039 | struct tb_tunnel *tunnel, *n; |
43bddb26 MW |
2040 | unsigned int usb3_delay = 0; |
2041 | LIST_HEAD(tunnels); | |
9d3cce0b | 2042 | |
daa5140f | 2043 | tb_dbg(tb, "resuming...\n"); |
23dd5bb4 AN |
2044 | |
2045 | /* remove any pci devices the firmware might have setup */ | |
356b6c4e | 2046 | tb_switch_reset(tb->root_switch); |
23dd5bb4 AN |
2047 | |
2048 | tb_switch_resume(tb->root_switch); | |
2049 | tb_free_invalid_tunnels(tb); | |
2050 | tb_free_unplugged_children(tb->root_switch); | |
91c0c120 | 2051 | tb_restore_children(tb->root_switch); |
43bddb26 MW |
2052 | |
2053 | /* | |
2054 | * If we get here from suspend to disk the boot firmware or the | |
2055 | * restore kernel might have created tunnels of its own. Since | |
2056 | * we cannot be sure they are usable for us we find and tear | |
2057 | * them down. | |
2058 | */ | |
2059 | tb_switch_discover_tunnels(tb->root_switch, &tunnels, false); | |
2060 | list_for_each_entry_safe_reverse(tunnel, n, &tunnels, list) { | |
2061 | if (tb_tunnel_is_usb3(tunnel)) | |
2062 | usb3_delay = 500; | |
2063 | tb_tunnel_deactivate(tunnel); | |
2064 | tb_tunnel_free(tunnel); | |
2065 | } | |
2066 | ||
2067 | /* Re-create our tunnels now */ | |
2068 | list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { | |
2069 | /* USB3 requires delay before it can be re-activated */ | |
2070 | if (tb_tunnel_is_usb3(tunnel)) { | |
2071 | msleep(usb3_delay); | |
2072 | /* Only need to do it once */ | |
2073 | usb3_delay = 0; | |
2074 | } | |
93f36ade | 2075 | tb_tunnel_restart(tunnel); |
43bddb26 | 2076 | } |
9d3cce0b | 2077 | if (!list_empty(&tcm->tunnel_list)) { |
23dd5bb4 AN |
2078 | /* |
2079 | * the pcie links need some time to get going. | |
2080 | * 100ms works for me... | |
2081 | */ | |
daa5140f | 2082 | tb_dbg(tb, "tunnels restarted, sleeping for 100ms\n"); |
23dd5bb4 AN |
2083 | msleep(100); |
2084 | } | |
2085 | /* Allow tb_handle_hotplug to progress events */ | |
9d3cce0b | 2086 | tcm->hotplug_active = true; |
daa5140f | 2087 | tb_dbg(tb, "resume finished\n"); |
9d3cce0b MW |
2088 | |
2089 | return 0; | |
2090 | } | |
2091 | ||
7ea4cd6b MW |
2092 | static int tb_free_unplugged_xdomains(struct tb_switch *sw) |
2093 | { | |
b433d010 MW |
2094 | struct tb_port *port; |
2095 | int ret = 0; | |
7ea4cd6b | 2096 | |
b433d010 | 2097 | tb_switch_for_each_port(sw, port) { |
7ea4cd6b MW |
2098 | if (tb_is_upstream_port(port)) |
2099 | continue; | |
2100 | if (port->xdomain && port->xdomain->is_unplugged) { | |
dacb1287 | 2101 | tb_retimer_remove_all(port); |
7ea4cd6b | 2102 | tb_xdomain_remove(port->xdomain); |
284652a4 | 2103 | tb_port_unconfigure_xdomain(port); |
7ea4cd6b MW |
2104 | port->xdomain = NULL; |
2105 | ret++; | |
2106 | } else if (port->remote) { | |
2107 | ret += tb_free_unplugged_xdomains(port->remote->sw); | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | return ret; | |
2112 | } | |
2113 | ||
884e4d57 MW |
2114 | static int tb_freeze_noirq(struct tb *tb) |
2115 | { | |
2116 | struct tb_cm *tcm = tb_priv(tb); | |
2117 | ||
2118 | tcm->hotplug_active = false; | |
2119 | return 0; | |
2120 | } | |
2121 | ||
2122 | static int tb_thaw_noirq(struct tb *tb) | |
2123 | { | |
2124 | struct tb_cm *tcm = tb_priv(tb); | |
2125 | ||
2126 | tcm->hotplug_active = true; | |
2127 | return 0; | |
2128 | } | |
2129 | ||
7ea4cd6b MW |
2130 | static void tb_complete(struct tb *tb) |
2131 | { | |
2132 | /* | |
2133 | * Release any unplugged XDomains and if there is a case where | |
2134 | * another domain is swapped in place of unplugged XDomain we | |
2135 | * need to run another rescan. | |
2136 | */ | |
2137 | mutex_lock(&tb->lock); | |
2138 | if (tb_free_unplugged_xdomains(tb->root_switch)) | |
2139 | tb_scan_switch(tb->root_switch); | |
2140 | mutex_unlock(&tb->lock); | |
2141 | } | |
2142 | ||
6ac6faee MW |
2143 | static int tb_runtime_suspend(struct tb *tb) |
2144 | { | |
2145 | struct tb_cm *tcm = tb_priv(tb); | |
2146 | ||
2147 | mutex_lock(&tb->lock); | |
2148 | tb_switch_suspend(tb->root_switch, true); | |
2149 | tcm->hotplug_active = false; | |
2150 | mutex_unlock(&tb->lock); | |
2151 | ||
2152 | return 0; | |
2153 | } | |
2154 | ||
2155 | static void tb_remove_work(struct work_struct *work) | |
2156 | { | |
2157 | struct tb_cm *tcm = container_of(work, struct tb_cm, remove_work.work); | |
2158 | struct tb *tb = tcm_to_tb(tcm); | |
2159 | ||
2160 | mutex_lock(&tb->lock); | |
2161 | if (tb->root_switch) { | |
2162 | tb_free_unplugged_children(tb->root_switch); | |
2163 | tb_free_unplugged_xdomains(tb->root_switch); | |
2164 | } | |
2165 | mutex_unlock(&tb->lock); | |
2166 | } | |
2167 | ||
2168 | static int tb_runtime_resume(struct tb *tb) | |
2169 | { | |
2170 | struct tb_cm *tcm = tb_priv(tb); | |
2171 | struct tb_tunnel *tunnel, *n; | |
2172 | ||
2173 | mutex_lock(&tb->lock); | |
2174 | tb_switch_resume(tb->root_switch); | |
2175 | tb_free_invalid_tunnels(tb); | |
2176 | tb_restore_children(tb->root_switch); | |
2177 | list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) | |
2178 | tb_tunnel_restart(tunnel); | |
2179 | tcm->hotplug_active = true; | |
2180 | mutex_unlock(&tb->lock); | |
2181 | ||
2182 | /* | |
2183 | * Schedule cleanup of any unplugged devices. Run this in a | |
2184 | * separate thread to avoid possible deadlock if the device | |
2185 | * removal runtime resumes the unplugged device. | |
2186 | */ | |
2187 | queue_delayed_work(tb->wq, &tcm->remove_work, msecs_to_jiffies(50)); | |
2188 | return 0; | |
2189 | } | |
2190 | ||
9d3cce0b MW |
2191 | static const struct tb_cm_ops tb_cm_ops = { |
2192 | .start = tb_start, | |
2193 | .stop = tb_stop, | |
2194 | .suspend_noirq = tb_suspend_noirq, | |
2195 | .resume_noirq = tb_resume_noirq, | |
884e4d57 MW |
2196 | .freeze_noirq = tb_freeze_noirq, |
2197 | .thaw_noirq = tb_thaw_noirq, | |
7ea4cd6b | 2198 | .complete = tb_complete, |
6ac6faee MW |
2199 | .runtime_suspend = tb_runtime_suspend, |
2200 | .runtime_resume = tb_runtime_resume, | |
81a54b5e | 2201 | .handle_event = tb_handle_event, |
3da88be2 | 2202 | .disapprove_switch = tb_disconnect_pci, |
99cabbb0 | 2203 | .approve_switch = tb_tunnel_pci, |
7ea4cd6b MW |
2204 | .approve_xdomain_paths = tb_approve_xdomain_paths, |
2205 | .disconnect_xdomain_paths = tb_disconnect_xdomain_paths, | |
9d3cce0b MW |
2206 | }; |
2207 | ||
349bfe08 MW |
2208 | /* |
2209 | * During suspend the Thunderbolt controller is reset and all PCIe | |
2210 | * tunnels are lost. The NHI driver will try to reestablish all tunnels | |
2211 | * during resume. This adds device links between the tunneled PCIe | |
2212 | * downstream ports and the NHI so that the device core will make sure | |
2213 | * NHI is resumed first before the rest. | |
2214 | */ | |
2215 | static void tb_apple_add_links(struct tb_nhi *nhi) | |
2216 | { | |
2217 | struct pci_dev *upstream, *pdev; | |
2218 | ||
2219 | if (!x86_apple_machine) | |
2220 | return; | |
2221 | ||
2222 | switch (nhi->pdev->device) { | |
2223 | case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE: | |
2224 | case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C: | |
2225 | case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI: | |
2226 | case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI: | |
2227 | break; | |
2228 | default: | |
2229 | return; | |
2230 | } | |
2231 | ||
2232 | upstream = pci_upstream_bridge(nhi->pdev); | |
2233 | while (upstream) { | |
2234 | if (!pci_is_pcie(upstream)) | |
2235 | return; | |
2236 | if (pci_pcie_type(upstream) == PCI_EXP_TYPE_UPSTREAM) | |
2237 | break; | |
2238 | upstream = pci_upstream_bridge(upstream); | |
2239 | } | |
2240 | ||
2241 | if (!upstream) | |
2242 | return; | |
2243 | ||
2244 | /* | |
2245 | * For each hotplug downstream port, create add device link | |
2246 | * back to NHI so that PCIe tunnels can be re-established after | |
2247 | * sleep. | |
2248 | */ | |
2249 | for_each_pci_bridge(pdev, upstream->subordinate) { | |
2250 | const struct device_link *link; | |
2251 | ||
2252 | if (!pci_is_pcie(pdev)) | |
2253 | continue; | |
2254 | if (pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM || | |
2255 | !pdev->is_hotplug_bridge) | |
2256 | continue; | |
2257 | ||
2258 | link = device_link_add(&pdev->dev, &nhi->pdev->dev, | |
2259 | DL_FLAG_AUTOREMOVE_SUPPLIER | | |
2260 | DL_FLAG_PM_RUNTIME); | |
2261 | if (link) { | |
2262 | dev_dbg(&nhi->pdev->dev, "created link from %s\n", | |
2263 | dev_name(&pdev->dev)); | |
2264 | } else { | |
2265 | dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n", | |
2266 | dev_name(&pdev->dev)); | |
2267 | } | |
2268 | } | |
2269 | } | |
2270 | ||
9d3cce0b MW |
2271 | struct tb *tb_probe(struct tb_nhi *nhi) |
2272 | { | |
2273 | struct tb_cm *tcm; | |
2274 | struct tb *tb; | |
2275 | ||
7f0a34d7 | 2276 | tb = tb_domain_alloc(nhi, TB_TIMEOUT, sizeof(*tcm)); |
9d3cce0b MW |
2277 | if (!tb) |
2278 | return NULL; | |
2279 | ||
c6da62a2 MW |
2280 | if (tb_acpi_may_tunnel_pcie()) |
2281 | tb->security_level = TB_SECURITY_USER; | |
2282 | else | |
2283 | tb->security_level = TB_SECURITY_NOPCIE; | |
2284 | ||
9d3cce0b MW |
2285 | tb->cm_ops = &tb_cm_ops; |
2286 | ||
2287 | tcm = tb_priv(tb); | |
2288 | INIT_LIST_HEAD(&tcm->tunnel_list); | |
8afe909b | 2289 | INIT_LIST_HEAD(&tcm->dp_resources); |
6ac6faee | 2290 | INIT_DELAYED_WORK(&tcm->remove_work, tb_remove_work); |
6ce35635 | 2291 | tb_init_bandwidth_groups(tcm); |
9d3cce0b | 2292 | |
e0258805 MW |
2293 | tb_dbg(tb, "using software connection manager\n"); |
2294 | ||
349bfe08 MW |
2295 | tb_apple_add_links(nhi); |
2296 | tb_acpi_add_links(nhi); | |
2297 | ||
9d3cce0b | 2298 | return tb; |
23dd5bb4 | 2299 | } |