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Linux 4.19.133
[linux/fpc-iii.git] / drivers / thunderbolt / icm.c
blob2b83d8b02f8186d416be45e5e28ef1a3026559e4
1 /*
2 * Internal Thunderbolt Connection Manager. This is a firmware running on
3 * the Thunderbolt host controller performing most of the low-level
4 * handling.
5 *
6 * Copyright (C) 2017, Intel Corporation
7 * Authors: Michael Jamet <michael.jamet@intel.com>
8 * Mika Westerberg <mika.westerberg@linux.intel.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/mutex.h>
17 #include <linux/pci.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/platform_data/x86/apple.h>
20 #include <linux/sizes.h>
21 #include <linux/slab.h>
22 #include <linux/workqueue.h>
23
24 #include "ctl.h"
25 #include "nhi_regs.h"
26 #include "tb.h"
27
28 #define PCIE2CIO_CMD 0x30
29 #define PCIE2CIO_CMD_TIMEOUT BIT(31)
30 #define PCIE2CIO_CMD_START BIT(30)
31 #define PCIE2CIO_CMD_WRITE BIT(21)
32 #define PCIE2CIO_CMD_CS_MASK GENMASK(20, 19)
33 #define PCIE2CIO_CMD_CS_SHIFT 19
34 #define PCIE2CIO_CMD_PORT_MASK GENMASK(18, 13)
35 #define PCIE2CIO_CMD_PORT_SHIFT 13
36
37 #define PCIE2CIO_WRDATA 0x34
38 #define PCIE2CIO_RDDATA 0x38
39
40 #define PHY_PORT_CS1 0x37
41 #define PHY_PORT_CS1_LINK_DISABLE BIT(14)
42 #define PHY_PORT_CS1_LINK_STATE_MASK GENMASK(29, 26)
43 #define PHY_PORT_CS1_LINK_STATE_SHIFT 26
44
45 #define ICM_TIMEOUT 5000 /* ms */
46 #define ICM_APPROVE_TIMEOUT 10000 /* ms */
47 #define ICM_MAX_LINK 4
48 #define ICM_MAX_DEPTH 6
49
50 /**
51 * struct icm - Internal connection manager private data
52 * @request_lock: Makes sure only one message is send to ICM at time
53 * @rescan_work: Work used to rescan the surviving switches after resume
54 * @upstream_port: Pointer to the PCIe upstream port this host
55 * controller is connected. This is only set for systems
56 * where ICM needs to be started manually
57 * @vnd_cap: Vendor defined capability where PCIe2CIO mailbox resides
58 * (only set when @upstream_port is not %NULL)
59 * @safe_mode: ICM is in safe mode
60 * @max_boot_acl: Maximum number of preboot ACL entries (%0 if not supported)
61 * @rpm: Does the controller support runtime PM (RTD3)
62 * @is_supported: Checks if we can support ICM on this controller
63 * @get_mode: Read and return the ICM firmware mode (optional)
64 * @get_route: Find a route string for given switch
65 * @save_devices: Ask ICM to save devices to ACL when suspending (optional)
66 * @driver_ready: Send driver ready message to ICM
67 * @device_connected: Handle device connected ICM message
68 * @device_disconnected: Handle device disconnected ICM message
69 * @xdomain_connected - Handle XDomain connected ICM message
70 * @xdomain_disconnected - Handle XDomain disconnected ICM message
71 */
72 struct icm {
73 struct mutex request_lock;
74 struct delayed_work rescan_work;
75 struct pci_dev *upstream_port;
76 size_t max_boot_acl;
77 int vnd_cap;
78 bool safe_mode;
79 bool rpm;
80 bool (*is_supported)(struct tb *tb);
81 int (*get_mode)(struct tb *tb);
82 int (*get_route)(struct tb *tb, u8 link, u8 depth, u64 *route);
83 void (*save_devices)(struct tb *tb);
84 int (*driver_ready)(struct tb *tb,
85 enum tb_security_level *security_level,
86 size_t *nboot_acl, bool *rpm);
87 void (*device_connected)(struct tb *tb,
88 const struct icm_pkg_header *hdr);
89 void (*device_disconnected)(struct tb *tb,
90 const struct icm_pkg_header *hdr);
91 void (*xdomain_connected)(struct tb *tb,
92 const struct icm_pkg_header *hdr);
93 void (*xdomain_disconnected)(struct tb *tb,
94 const struct icm_pkg_header *hdr);
95 };
96
97 struct icm_notification {
98 struct work_struct work;
99 struct icm_pkg_header *pkg;
100 struct tb *tb;
101 };
102
103 struct ep_name_entry {
104 u8 len;
105 u8 type;
106 u8 data[0];
107 };
108
109 #define EP_NAME_INTEL_VSS 0x10
110
111 /* Intel Vendor specific structure */
112 struct intel_vss {
113 u16 vendor;
114 u16 model;
115 u8 mc;
116 u8 flags;
117 u16 pci_devid;
118 u32 nvm_version;
119 };
120
121 #define INTEL_VSS_FLAGS_RTD3 BIT(0)
122
123 static const struct intel_vss *parse_intel_vss(const void *ep_name, size_t size)
124 {
125 const void *end = ep_name + size;
126
127 while (ep_name < end) {
128 const struct ep_name_entry *ep = ep_name;
129
130 if (!ep->len)
131 break;
132 if (ep_name + ep->len > end)
133 break;
134
135 if (ep->type == EP_NAME_INTEL_VSS)
136 return (const struct intel_vss *)ep->data;
137
138 ep_name += ep->len;
139 }
140
141 return NULL;
142 }
143
144 static inline struct tb *icm_to_tb(struct icm *icm)
145 {
146 return ((void *)icm - sizeof(struct tb));
147 }
148
149 static inline u8 phy_port_from_route(u64 route, u8 depth)
150 {
151 u8 link;
152
153 link = depth ? route >> ((depth - 1) * 8) : route;
154 return tb_phy_port_from_link(link);
155 }
156
157 static inline u8 dual_link_from_link(u8 link)
158 {
159 return link ? ((link - 1) ^ 0x01) + 1 : 0;
160 }
161
162 static inline u64 get_route(u32 route_hi, u32 route_lo)
163 {
164 return (u64)route_hi << 32 | route_lo;
165 }
166
167 static inline u64 get_parent_route(u64 route)
168 {
169 int depth = tb_route_length(route);
170 return depth ? route & ~(0xffULL << (depth - 1) * TB_ROUTE_SHIFT) : 0;
171 }
172
173 static bool icm_match(const struct tb_cfg_request *req,
174 const struct ctl_pkg *pkg)
175 {
176 const struct icm_pkg_header *res_hdr = pkg->buffer;
177 const struct icm_pkg_header *req_hdr = req->request;
178
179 if (pkg->frame.eof != req->response_type)
180 return false;
181 if (res_hdr->code != req_hdr->code)
182 return false;
183
184 return true;
185 }
186
187 static bool icm_copy(struct tb_cfg_request *req, const struct ctl_pkg *pkg)
188 {
189 const struct icm_pkg_header *hdr = pkg->buffer;
190
191 if (hdr->packet_id < req->npackets) {
192 size_t offset = hdr->packet_id * req->response_size;
193
194 memcpy(req->response + offset, pkg->buffer, req->response_size);
195 }
196
197 return hdr->packet_id == hdr->total_packets - 1;
198 }
199
200 static int icm_request(struct tb *tb, const void *request, size_t request_size,
201 void *response, size_t response_size, size_t npackets,
202 unsigned int timeout_msec)
203 {
204 struct icm *icm = tb_priv(tb);
205 int retries = 3;
206
207 do {
208 struct tb_cfg_request *req;
209 struct tb_cfg_result res;
210
211 req = tb_cfg_request_alloc();
212 if (!req)
213 return -ENOMEM;
214
215 req->match = icm_match;
216 req->copy = icm_copy;
217 req->request = request;
218 req->request_size = request_size;
219 req->request_type = TB_CFG_PKG_ICM_CMD;
220 req->response = response;
221 req->npackets = npackets;
222 req->response_size = response_size;
223 req->response_type = TB_CFG_PKG_ICM_RESP;
224
225 mutex_lock(&icm->request_lock);
226 res = tb_cfg_request_sync(tb->ctl, req, timeout_msec);
227 mutex_unlock(&icm->request_lock);
228
229 tb_cfg_request_put(req);
230
231 if (res.err != -ETIMEDOUT)
232 return res.err == 1 ? -EIO : res.err;
233
234 usleep_range(20, 50);
235 } while (retries--);
236
237 return -ETIMEDOUT;
238 }
239
240 static bool icm_fr_is_supported(struct tb *tb)
241 {
242 return !x86_apple_machine;
243 }
244
245 static inline int icm_fr_get_switch_index(u32 port)
246 {
247 int index;
248
249 if ((port & ICM_PORT_TYPE_MASK) != TB_TYPE_PORT)
250 return 0;
251
252 index = port >> ICM_PORT_INDEX_SHIFT;
253 return index != 0xff ? index : 0;
254 }
255
256 static int icm_fr_get_route(struct tb *tb, u8 link, u8 depth, u64 *route)
257 {
258 struct icm_fr_pkg_get_topology_response *switches, *sw;
259 struct icm_fr_pkg_get_topology request = {
260 .hdr = { .code = ICM_GET_TOPOLOGY },
261 };
262 size_t npackets = ICM_GET_TOPOLOGY_PACKETS;
263 int ret, index;
264 u8 i;
265
266 switches = kcalloc(npackets, sizeof(*switches), GFP_KERNEL);
267 if (!switches)
268 return -ENOMEM;
269
270 ret = icm_request(tb, &request, sizeof(request), switches,
271 sizeof(*switches), npackets, ICM_TIMEOUT);
272 if (ret)
273 goto err_free;
274
275 sw = &switches[0];
276 index = icm_fr_get_switch_index(sw->ports[link]);
277 if (!index) {
278 ret = -ENODEV;
279 goto err_free;
280 }
281
282 sw = &switches[index];
283 for (i = 1; i < depth; i++) {
284 unsigned int j;
285
286 if (!(sw->first_data & ICM_SWITCH_USED)) {
287 ret = -ENODEV;
288 goto err_free;
289 }
290
291 for (j = 0; j < ARRAY_SIZE(sw->ports); j++) {
292 index = icm_fr_get_switch_index(sw->ports[j]);
293 if (index > sw->switch_index) {
294 sw = &switches[index];
295 break;
296 }
297 }
298 }
299
300 *route = get_route(sw->route_hi, sw->route_lo);
301
302 err_free:
303 kfree(switches);
304 return ret;
305 }
306
307 static void icm_fr_save_devices(struct tb *tb)
308 {
309 nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_SAVE_DEVS, 0);
310 }
311
312 static int
313 icm_fr_driver_ready(struct tb *tb, enum tb_security_level *security_level,
314 size_t *nboot_acl, bool *rpm)
315 {
316 struct icm_fr_pkg_driver_ready_response reply;
317 struct icm_pkg_driver_ready request = {
318 .hdr.code = ICM_DRIVER_READY,
319 };
320 int ret;
321
322 memset(&reply, 0, sizeof(reply));
323 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
324 1, ICM_TIMEOUT);
325 if (ret)
326 return ret;
327
328 if (security_level)
329 *security_level = reply.security_level & ICM_FR_SLEVEL_MASK;
330
331 return 0;
332 }
333
334 static int icm_fr_approve_switch(struct tb *tb, struct tb_switch *sw)
335 {
336 struct icm_fr_pkg_approve_device request;
337 struct icm_fr_pkg_approve_device reply;
338 int ret;
339
340 memset(&request, 0, sizeof(request));
341 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
342 request.hdr.code = ICM_APPROVE_DEVICE;
343 request.connection_id = sw->connection_id;
344 request.connection_key = sw->connection_key;
345
346 memset(&reply, 0, sizeof(reply));
347 /* Use larger timeout as establishing tunnels can take some time */
348 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
349 1, ICM_APPROVE_TIMEOUT);
350 if (ret)
351 return ret;
352
353 if (reply.hdr.flags & ICM_FLAGS_ERROR) {
354 tb_warn(tb, "PCIe tunnel creation failed\n");
355 return -EIO;
356 }
357
358 return 0;
359 }
360
361 static int icm_fr_add_switch_key(struct tb *tb, struct tb_switch *sw)
362 {
363 struct icm_fr_pkg_add_device_key request;
364 struct icm_fr_pkg_add_device_key_response reply;
365 int ret;
366
367 memset(&request, 0, sizeof(request));
368 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
369 request.hdr.code = ICM_ADD_DEVICE_KEY;
370 request.connection_id = sw->connection_id;
371 request.connection_key = sw->connection_key;
372 memcpy(request.key, sw->key, TB_SWITCH_KEY_SIZE);
373
374 memset(&reply, 0, sizeof(reply));
375 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
376 1, ICM_TIMEOUT);
377 if (ret)
378 return ret;
379
380 if (reply.hdr.flags & ICM_FLAGS_ERROR) {
381 tb_warn(tb, "Adding key to switch failed\n");
382 return -EIO;
383 }
384
385 return 0;
386 }
387
388 static int icm_fr_challenge_switch_key(struct tb *tb, struct tb_switch *sw,
389 const u8 *challenge, u8 *response)
390 {
391 struct icm_fr_pkg_challenge_device request;
392 struct icm_fr_pkg_challenge_device_response reply;
393 int ret;
394
395 memset(&request, 0, sizeof(request));
396 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
397 request.hdr.code = ICM_CHALLENGE_DEVICE;
398 request.connection_id = sw->connection_id;
399 request.connection_key = sw->connection_key;
400 memcpy(request.challenge, challenge, TB_SWITCH_KEY_SIZE);
401
402 memset(&reply, 0, sizeof(reply));
403 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
404 1, ICM_TIMEOUT);
405 if (ret)
406 return ret;
407
408 if (reply.hdr.flags & ICM_FLAGS_ERROR)
409 return -EKEYREJECTED;
410 if (reply.hdr.flags & ICM_FLAGS_NO_KEY)
411 return -ENOKEY;
412
413 memcpy(response, reply.response, TB_SWITCH_KEY_SIZE);
414
415 return 0;
416 }
417
418 static int icm_fr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
419 {
420 struct icm_fr_pkg_approve_xdomain_response reply;
421 struct icm_fr_pkg_approve_xdomain request;
422 int ret;
423
424 memset(&request, 0, sizeof(request));
425 request.hdr.code = ICM_APPROVE_XDOMAIN;
426 request.link_info = xd->depth << ICM_LINK_INFO_DEPTH_SHIFT | xd->link;
427 memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid));
428
429 request.transmit_path = xd->transmit_path;
430 request.transmit_ring = xd->transmit_ring;
431 request.receive_path = xd->receive_path;
432 request.receive_ring = xd->receive_ring;
433
434 memset(&reply, 0, sizeof(reply));
435 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
436 1, ICM_TIMEOUT);
437 if (ret)
438 return ret;
439
440 if (reply.hdr.flags & ICM_FLAGS_ERROR)
441 return -EIO;
442
443 return 0;
444 }
445
446 static int icm_fr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
447 {
448 u8 phy_port;
449 u8 cmd;
450
451 phy_port = tb_phy_port_from_link(xd->link);
452 if (phy_port == 0)
453 cmd = NHI_MAILBOX_DISCONNECT_PA;
454 else
455 cmd = NHI_MAILBOX_DISCONNECT_PB;
456
457 nhi_mailbox_cmd(tb->nhi, cmd, 1);
458 usleep_range(10, 50);
459 nhi_mailbox_cmd(tb->nhi, cmd, 2);
460 return 0;
461 }
462
463 static void add_switch(struct tb_switch *parent_sw, u64 route,
464 const uuid_t *uuid, const u8 *ep_name,
465 size_t ep_name_size, u8 connection_id, u8 connection_key,
466 u8 link, u8 depth, enum tb_security_level security_level,
467 bool authorized, bool boot)
468 {
469 const struct intel_vss *vss;
470 struct tb_switch *sw;
471
472 pm_runtime_get_sync(&parent_sw->dev);
473
474 sw = tb_switch_alloc(parent_sw->tb, &parent_sw->dev, route);
475 if (!sw)
476 goto out;
477
478 sw->uuid = kmemdup(uuid, sizeof(*uuid), GFP_KERNEL);
479 if (!sw->uuid) {
480 tb_sw_warn(sw, "cannot allocate memory for switch\n");
481 tb_switch_put(sw);
482 goto out;
483 }
484 sw->connection_id = connection_id;
485 sw->connection_key = connection_key;
486 sw->link = link;
487 sw->depth = depth;
488 sw->authorized = authorized;
489 sw->security_level = security_level;
490 sw->boot = boot;
491
492 vss = parse_intel_vss(ep_name, ep_name_size);
493 if (vss)
494 sw->rpm = !!(vss->flags & INTEL_VSS_FLAGS_RTD3);
495
496 /* Link the two switches now */
497 tb_port_at(route, parent_sw)->remote = tb_upstream_port(sw);
498 tb_upstream_port(sw)->remote = tb_port_at(route, parent_sw);
499
500 if (tb_switch_add(sw)) {
501 tb_port_at(tb_route(sw), parent_sw)->remote = NULL;
502 tb_switch_put(sw);
503 }
504
505 out:
506 pm_runtime_mark_last_busy(&parent_sw->dev);
507 pm_runtime_put_autosuspend(&parent_sw->dev);
508 }
509
510 static void update_switch(struct tb_switch *parent_sw, struct tb_switch *sw,
511 u64 route, u8 connection_id, u8 connection_key,
512 u8 link, u8 depth, bool boot)
513 {
514 /* Disconnect from parent */
515 tb_port_at(tb_route(sw), parent_sw)->remote = NULL;
516 /* Re-connect via updated port*/
517 tb_port_at(route, parent_sw)->remote = tb_upstream_port(sw);
518
519 /* Update with the new addressing information */
520 sw->config.route_hi = upper_32_bits(route);
521 sw->config.route_lo = lower_32_bits(route);
522 sw->connection_id = connection_id;
523 sw->connection_key = connection_key;
524 sw->link = link;
525 sw->depth = depth;
526 sw->boot = boot;
527
528 /* This switch still exists */
529 sw->is_unplugged = false;
530 }
531
532 static void remove_switch(struct tb_switch *sw)
533 {
534 struct tb_switch *parent_sw;
535
536 parent_sw = tb_to_switch(sw->dev.parent);
537 tb_port_at(tb_route(sw), parent_sw)->remote = NULL;
538 tb_switch_remove(sw);
539 }
540
541 static void add_xdomain(struct tb_switch *sw, u64 route,
542 const uuid_t *local_uuid, const uuid_t *remote_uuid,
543 u8 link, u8 depth)
544 {
545 struct tb_xdomain *xd;
546
547 pm_runtime_get_sync(&sw->dev);
548
549 xd = tb_xdomain_alloc(sw->tb, &sw->dev, route, local_uuid, remote_uuid);
550 if (!xd)
551 goto out;
552
553 xd->link = link;
554 xd->depth = depth;
555
556 tb_port_at(route, sw)->xdomain = xd;
557
558 tb_xdomain_add(xd);
559
560 out:
561 pm_runtime_mark_last_busy(&sw->dev);
562 pm_runtime_put_autosuspend(&sw->dev);
563 }
564
565 static void update_xdomain(struct tb_xdomain *xd, u64 route, u8 link)
566 {
567 xd->link = link;
568 xd->route = route;
569 xd->is_unplugged = false;
570 }
571
572 static void remove_xdomain(struct tb_xdomain *xd)
573 {
574 struct tb_switch *sw;
575
576 sw = tb_to_switch(xd->dev.parent);
577 tb_port_at(xd->route, sw)->xdomain = NULL;
578 tb_xdomain_remove(xd);
579 }
580
581 static void
582 icm_fr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr)
583 {
584 const struct icm_fr_event_device_connected *pkg =
585 (const struct icm_fr_event_device_connected *)hdr;
586 enum tb_security_level security_level;
587 struct tb_switch *sw, *parent_sw;
588 struct icm *icm = tb_priv(tb);
589 bool authorized = false;
590 struct tb_xdomain *xd;
591 u8 link, depth;
592 bool boot;
593 u64 route;
594 int ret;
595
596 link = pkg->link_info & ICM_LINK_INFO_LINK_MASK;
597 depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
598 ICM_LINK_INFO_DEPTH_SHIFT;
599 authorized = pkg->link_info & ICM_LINK_INFO_APPROVED;
600 security_level = (pkg->hdr.flags & ICM_FLAGS_SLEVEL_MASK) >>
601 ICM_FLAGS_SLEVEL_SHIFT;
602 boot = pkg->link_info & ICM_LINK_INFO_BOOT;
603
604 if (pkg->link_info & ICM_LINK_INFO_REJECTED) {
605 tb_info(tb, "switch at %u.%u was rejected by ICM firmware because topology limit exceeded\n",
606 link, depth);
607 return;
608 }
609
610 sw = tb_switch_find_by_uuid(tb, &pkg->ep_uuid);
611 if (sw) {
612 u8 phy_port, sw_phy_port;
613
614 parent_sw = tb_to_switch(sw->dev.parent);
615 sw_phy_port = tb_phy_port_from_link(sw->link);
616 phy_port = tb_phy_port_from_link(link);
617
618 /*
619 * On resume ICM will send us connected events for the
620 * devices that still are present. However, that
621 * information might have changed for example by the
622 * fact that a switch on a dual-link connection might
623 * have been enumerated using the other link now. Make
624 * sure our book keeping matches that.
625 */
626 if (sw->depth == depth && sw_phy_port == phy_port &&
627 !!sw->authorized == authorized) {
628 /*
629 * It was enumerated through another link so update
630 * route string accordingly.
631 */
632 if (sw->link != link) {
633 ret = icm->get_route(tb, link, depth, &route);
634 if (ret) {
635 tb_err(tb, "failed to update route string for switch at %u.%u\n",
636 link, depth);
637 tb_switch_put(sw);
638 return;
639 }
640 } else {
641 route = tb_route(sw);
642 }
643
644 update_switch(parent_sw, sw, route, pkg->connection_id,
645 pkg->connection_key, link, depth, boot);
646 tb_switch_put(sw);
647 return;
648 }
649
650 /*
651 * User connected the same switch to another physical
652 * port or to another part of the topology. Remove the
653 * existing switch now before adding the new one.
654 */
655 remove_switch(sw);
656 tb_switch_put(sw);
657 }
658
659 /*
660 * If the switch was not found by UUID, look for a switch on
661 * same physical port (taking possible link aggregation into
662 * account) and depth. If we found one it is definitely a stale
663 * one so remove it first.
664 */
665 sw = tb_switch_find_by_link_depth(tb, link, depth);
666 if (!sw) {
667 u8 dual_link;
668
669 dual_link = dual_link_from_link(link);
670 if (dual_link)
671 sw = tb_switch_find_by_link_depth(tb, dual_link, depth);
672 }
673 if (sw) {
674 remove_switch(sw);
675 tb_switch_put(sw);
676 }
677
678 /* Remove existing XDomain connection if found */
679 xd = tb_xdomain_find_by_link_depth(tb, link, depth);
680 if (xd) {
681 remove_xdomain(xd);
682 tb_xdomain_put(xd);
683 }
684
685 parent_sw = tb_switch_find_by_link_depth(tb, link, depth - 1);
686 if (!parent_sw) {
687 tb_err(tb, "failed to find parent switch for %u.%u\n",
688 link, depth);
689 return;
690 }
691
692 ret = icm->get_route(tb, link, depth, &route);
693 if (ret) {
694 tb_err(tb, "failed to find route string for switch at %u.%u\n",
695 link, depth);
696 tb_switch_put(parent_sw);
697 return;
698 }
699
700 add_switch(parent_sw, route, &pkg->ep_uuid, (const u8 *)pkg->ep_name,
701 sizeof(pkg->ep_name), pkg->connection_id,
702 pkg->connection_key, link, depth, security_level,
703 authorized, boot);
704
705 tb_switch_put(parent_sw);
706 }
707
708 static void
709 icm_fr_device_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
710 {
711 const struct icm_fr_event_device_disconnected *pkg =
712 (const struct icm_fr_event_device_disconnected *)hdr;
713 struct tb_switch *sw;
714 u8 link, depth;
715
716 link = pkg->link_info & ICM_LINK_INFO_LINK_MASK;
717 depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
718 ICM_LINK_INFO_DEPTH_SHIFT;
719
720 if (link > ICM_MAX_LINK || depth > ICM_MAX_DEPTH) {
721 tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth);
722 return;
723 }
724
725 sw = tb_switch_find_by_link_depth(tb, link, depth);
726 if (!sw) {
727 tb_warn(tb, "no switch exists at %u.%u, ignoring\n", link,
728 depth);
729 return;
730 }
731
732 remove_switch(sw);
733 tb_switch_put(sw);
734 }
735
736 static void
737 icm_fr_xdomain_connected(struct tb *tb, const struct icm_pkg_header *hdr)
738 {
739 const struct icm_fr_event_xdomain_connected *pkg =
740 (const struct icm_fr_event_xdomain_connected *)hdr;
741 struct tb_xdomain *xd;
742 struct tb_switch *sw;
743 u8 link, depth;
744 u64 route;
745
746 link = pkg->link_info & ICM_LINK_INFO_LINK_MASK;
747 depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
748 ICM_LINK_INFO_DEPTH_SHIFT;
749
750 if (link > ICM_MAX_LINK || depth > ICM_MAX_DEPTH) {
751 tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth);
752 return;
753 }
754
755 route = get_route(pkg->local_route_hi, pkg->local_route_lo);
756
757 xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid);
758 if (xd) {
759 u8 xd_phy_port, phy_port;
760
761 xd_phy_port = phy_port_from_route(xd->route, xd->depth);
762 phy_port = phy_port_from_route(route, depth);
763
764 if (xd->depth == depth && xd_phy_port == phy_port) {
765 update_xdomain(xd, route, link);
766 tb_xdomain_put(xd);
767 return;
768 }
769
770 /*
771 * If we find an existing XDomain connection remove it
772 * now. We need to go through login handshake and
773 * everything anyway to be able to re-establish the
774 * connection.
775 */
776 remove_xdomain(xd);
777 tb_xdomain_put(xd);
778 }
779
780 /*
781 * Look if there already exists an XDomain in the same place
782 * than the new one and in that case remove it because it is
783 * most likely another host that got disconnected.
784 */
785 xd = tb_xdomain_find_by_link_depth(tb, link, depth);
786 if (!xd) {
787 u8 dual_link;
788
789 dual_link = dual_link_from_link(link);
790 if (dual_link)
791 xd = tb_xdomain_find_by_link_depth(tb, dual_link,
792 depth);
793 }
794 if (xd) {
795 remove_xdomain(xd);
796 tb_xdomain_put(xd);
797 }
798
799 /*
800 * If the user disconnected a switch during suspend and
801 * connected another host to the same port, remove the switch
802 * first.
803 */
804 sw = tb_switch_find_by_route(tb, route);
805 if (sw) {
806 remove_switch(sw);
807 tb_switch_put(sw);
808 }
809
810 sw = tb_switch_find_by_link_depth(tb, link, depth);
811 if (!sw) {
812 tb_warn(tb, "no switch exists at %u.%u, ignoring\n", link,
813 depth);
814 return;
815 }
816
817 add_xdomain(sw, route, &pkg->local_uuid, &pkg->remote_uuid, link,
818 depth);
819 tb_switch_put(sw);
820 }
821
822 static void
823 icm_fr_xdomain_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
824 {
825 const struct icm_fr_event_xdomain_disconnected *pkg =
826 (const struct icm_fr_event_xdomain_disconnected *)hdr;
827 struct tb_xdomain *xd;
828
829 /*
830 * If the connection is through one or multiple devices, the
831 * XDomain device is removed along with them so it is fine if we
832 * cannot find it here.
833 */
834 xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid);
835 if (xd) {
836 remove_xdomain(xd);
837 tb_xdomain_put(xd);
838 }
839 }
840
841 static int
842 icm_tr_driver_ready(struct tb *tb, enum tb_security_level *security_level,
843 size_t *nboot_acl, bool *rpm)
844 {
845 struct icm_tr_pkg_driver_ready_response reply;
846 struct icm_pkg_driver_ready request = {
847 .hdr.code = ICM_DRIVER_READY,
848 };
849 int ret;
850
851 memset(&reply, 0, sizeof(reply));
852 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
853 1, 20000);
854 if (ret)
855 return ret;
856
857 if (security_level)
858 *security_level = reply.info & ICM_TR_INFO_SLEVEL_MASK;
859 if (nboot_acl)
860 *nboot_acl = (reply.info & ICM_TR_INFO_BOOT_ACL_MASK) >>
861 ICM_TR_INFO_BOOT_ACL_SHIFT;
862 if (rpm)
863 *rpm = !!(reply.hdr.flags & ICM_TR_FLAGS_RTD3);
864
865 return 0;
866 }
867
868 static int icm_tr_approve_switch(struct tb *tb, struct tb_switch *sw)
869 {
870 struct icm_tr_pkg_approve_device request;
871 struct icm_tr_pkg_approve_device reply;
872 int ret;
873
874 memset(&request, 0, sizeof(request));
875 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
876 request.hdr.code = ICM_APPROVE_DEVICE;
877 request.route_lo = sw->config.route_lo;
878 request.route_hi = sw->config.route_hi;
879 request.connection_id = sw->connection_id;
880
881 memset(&reply, 0, sizeof(reply));
882 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
883 1, ICM_APPROVE_TIMEOUT);
884 if (ret)
885 return ret;
886
887 if (reply.hdr.flags & ICM_FLAGS_ERROR) {
888 tb_warn(tb, "PCIe tunnel creation failed\n");
889 return -EIO;
890 }
891
892 return 0;
893 }
894
895 static int icm_tr_add_switch_key(struct tb *tb, struct tb_switch *sw)
896 {
897 struct icm_tr_pkg_add_device_key_response reply;
898 struct icm_tr_pkg_add_device_key request;
899 int ret;
900
901 memset(&request, 0, sizeof(request));
902 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
903 request.hdr.code = ICM_ADD_DEVICE_KEY;
904 request.route_lo = sw->config.route_lo;
905 request.route_hi = sw->config.route_hi;
906 request.connection_id = sw->connection_id;
907 memcpy(request.key, sw->key, TB_SWITCH_KEY_SIZE);
908
909 memset(&reply, 0, sizeof(reply));
910 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
911 1, ICM_TIMEOUT);
912 if (ret)
913 return ret;
914
915 if (reply.hdr.flags & ICM_FLAGS_ERROR) {
916 tb_warn(tb, "Adding key to switch failed\n");
917 return -EIO;
918 }
919
920 return 0;
921 }
922
923 static int icm_tr_challenge_switch_key(struct tb *tb, struct tb_switch *sw,
924 const u8 *challenge, u8 *response)
925 {
926 struct icm_tr_pkg_challenge_device_response reply;
927 struct icm_tr_pkg_challenge_device request;
928 int ret;
929
930 memset(&request, 0, sizeof(request));
931 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
932 request.hdr.code = ICM_CHALLENGE_DEVICE;
933 request.route_lo = sw->config.route_lo;
934 request.route_hi = sw->config.route_hi;
935 request.connection_id = sw->connection_id;
936 memcpy(request.challenge, challenge, TB_SWITCH_KEY_SIZE);
937
938 memset(&reply, 0, sizeof(reply));
939 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
940 1, ICM_TIMEOUT);
941 if (ret)
942 return ret;
943
944 if (reply.hdr.flags & ICM_FLAGS_ERROR)
945 return -EKEYREJECTED;
946 if (reply.hdr.flags & ICM_FLAGS_NO_KEY)
947 return -ENOKEY;
948
949 memcpy(response, reply.response, TB_SWITCH_KEY_SIZE);
950
951 return 0;
952 }
953
954 static int icm_tr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
955 {
956 struct icm_tr_pkg_approve_xdomain_response reply;
957 struct icm_tr_pkg_approve_xdomain request;
958 int ret;
959
960 memset(&request, 0, sizeof(request));
961 request.hdr.code = ICM_APPROVE_XDOMAIN;
962 request.route_hi = upper_32_bits(xd->route);
963 request.route_lo = lower_32_bits(xd->route);
964 request.transmit_path = xd->transmit_path;
965 request.transmit_ring = xd->transmit_ring;
966 request.receive_path = xd->receive_path;
967 request.receive_ring = xd->receive_ring;
968 memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid));
969
970 memset(&reply, 0, sizeof(reply));
971 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
972 1, ICM_TIMEOUT);
973 if (ret)
974 return ret;
975
976 if (reply.hdr.flags & ICM_FLAGS_ERROR)
977 return -EIO;
978
979 return 0;
980 }
981
982 static int icm_tr_xdomain_tear_down(struct tb *tb, struct tb_xdomain *xd,
983 int stage)
984 {
985 struct icm_tr_pkg_disconnect_xdomain_response reply;
986 struct icm_tr_pkg_disconnect_xdomain request;
987 int ret;
988
989 memset(&request, 0, sizeof(request));
990 request.hdr.code = ICM_DISCONNECT_XDOMAIN;
991 request.stage = stage;
992 request.route_hi = upper_32_bits(xd->route);
993 request.route_lo = lower_32_bits(xd->route);
994 memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid));
995
996 memset(&reply, 0, sizeof(reply));
997 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
998 1, ICM_TIMEOUT);
999 if (ret)
1000 return ret;
1001
1002 if (reply.hdr.flags & ICM_FLAGS_ERROR)
1003 return -EIO;
1004
1005 return 0;
1006 }
1007
1008 static int icm_tr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
1009 {
1010 int ret;
1011
1012 ret = icm_tr_xdomain_tear_down(tb, xd, 1);
1013 if (ret)
1014 return ret;
1015
1016 usleep_range(10, 50);
1017 return icm_tr_xdomain_tear_down(tb, xd, 2);
1018 }
1019
1020 static void
1021 icm_tr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr)
1022 {
1023 const struct icm_tr_event_device_connected *pkg =
1024 (const struct icm_tr_event_device_connected *)hdr;
1025 enum tb_security_level security_level;
1026 struct tb_switch *sw, *parent_sw;
1027 struct tb_xdomain *xd;
1028 bool authorized, boot;
1029 u64 route;
1030
1031 /*
1032 * Currently we don't use the QoS information coming with the
1033 * device connected message so simply just ignore that extra
1034 * packet for now.
1035 */
1036 if (pkg->hdr.packet_id)
1037 return;
1038
1039 route = get_route(pkg->route_hi, pkg->route_lo);
1040 authorized = pkg->link_info & ICM_LINK_INFO_APPROVED;
1041 security_level = (pkg->hdr.flags & ICM_FLAGS_SLEVEL_MASK) >>
1042 ICM_FLAGS_SLEVEL_SHIFT;
1043 boot = pkg->link_info & ICM_LINK_INFO_BOOT;
1044
1045 if (pkg->link_info & ICM_LINK_INFO_REJECTED) {
1046 tb_info(tb, "switch at %llx was rejected by ICM firmware because topology limit exceeded\n",
1047 route);
1048 return;
1049 }
1050
1051 sw = tb_switch_find_by_uuid(tb, &pkg->ep_uuid);
1052 if (sw) {
1053 /* Update the switch if it is still in the same place */
1054 if (tb_route(sw) == route && !!sw->authorized == authorized) {
1055 parent_sw = tb_to_switch(sw->dev.parent);
1056 update_switch(parent_sw, sw, route, pkg->connection_id,
1057 0, 0, 0, boot);
1058 tb_switch_put(sw);
1059 return;
1060 }
1061
1062 remove_switch(sw);
1063 tb_switch_put(sw);
1064 }
1065
1066 /* Another switch with the same address */
1067 sw = tb_switch_find_by_route(tb, route);
1068 if (sw) {
1069 remove_switch(sw);
1070 tb_switch_put(sw);
1071 }
1072
1073 /* XDomain connection with the same address */
1074 xd = tb_xdomain_find_by_route(tb, route);
1075 if (xd) {
1076 remove_xdomain(xd);
1077 tb_xdomain_put(xd);
1078 }
1079
1080 parent_sw = tb_switch_find_by_route(tb, get_parent_route(route));
1081 if (!parent_sw) {
1082 tb_err(tb, "failed to find parent switch for %llx\n", route);
1083 return;
1084 }
1085
1086 add_switch(parent_sw, route, &pkg->ep_uuid, (const u8 *)pkg->ep_name,
1087 sizeof(pkg->ep_name), pkg->connection_id,
1088 0, 0, 0, security_level, authorized, boot);
1089
1090 tb_switch_put(parent_sw);
1091 }
1092
1093 static void
1094 icm_tr_device_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
1095 {
1096 const struct icm_tr_event_device_disconnected *pkg =
1097 (const struct icm_tr_event_device_disconnected *)hdr;
1098 struct tb_switch *sw;
1099 u64 route;
1100
1101 route = get_route(pkg->route_hi, pkg->route_lo);
1102
1103 sw = tb_switch_find_by_route(tb, route);
1104 if (!sw) {
1105 tb_warn(tb, "no switch exists at %llx, ignoring\n", route);
1106 return;
1107 }
1108
1109 remove_switch(sw);
1110 tb_switch_put(sw);
1111 }
1112
1113 static void
1114 icm_tr_xdomain_connected(struct tb *tb, const struct icm_pkg_header *hdr)
1115 {
1116 const struct icm_tr_event_xdomain_connected *pkg =
1117 (const struct icm_tr_event_xdomain_connected *)hdr;
1118 struct tb_xdomain *xd;
1119 struct tb_switch *sw;
1120 u64 route;
1121
1122 if (!tb->root_switch)
1123 return;
1124
1125 route = get_route(pkg->local_route_hi, pkg->local_route_lo);
1126
1127 xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid);
1128 if (xd) {
1129 if (xd->route == route) {
1130 update_xdomain(xd, route, 0);
1131 tb_xdomain_put(xd);
1132 return;
1133 }
1134
1135 remove_xdomain(xd);
1136 tb_xdomain_put(xd);
1137 }
1138
1139 /* An existing xdomain with the same address */
1140 xd = tb_xdomain_find_by_route(tb, route);
1141 if (xd) {
1142 remove_xdomain(xd);
1143 tb_xdomain_put(xd);
1144 }
1145
1146 /*
1147 * If the user disconnected a switch during suspend and
1148 * connected another host to the same port, remove the switch
1149 * first.
1150 */
1151 sw = tb_switch_find_by_route(tb, route);
1152 if (sw) {
1153 remove_switch(sw);
1154 tb_switch_put(sw);
1155 }
1156
1157 sw = tb_switch_find_by_route(tb, get_parent_route(route));
1158 if (!sw) {
1159 tb_warn(tb, "no switch exists at %llx, ignoring\n", route);
1160 return;
1161 }
1162
1163 add_xdomain(sw, route, &pkg->local_uuid, &pkg->remote_uuid, 0, 0);
1164 tb_switch_put(sw);
1165 }
1166
1167 static void
1168 icm_tr_xdomain_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
1169 {
1170 const struct icm_tr_event_xdomain_disconnected *pkg =
1171 (const struct icm_tr_event_xdomain_disconnected *)hdr;
1172 struct tb_xdomain *xd;
1173 u64 route;
1174
1175 route = get_route(pkg->route_hi, pkg->route_lo);
1176
1177 xd = tb_xdomain_find_by_route(tb, route);
1178 if (xd) {
1179 remove_xdomain(xd);
1180 tb_xdomain_put(xd);
1181 }
1182 }
1183
1184 static struct pci_dev *get_upstream_port(struct pci_dev *pdev)
1185 {
1186 struct pci_dev *parent;
1187
1188 parent = pci_upstream_bridge(pdev);
1189 while (parent) {
1190 if (!pci_is_pcie(parent))
1191 return NULL;
1192 if (pci_pcie_type(parent) == PCI_EXP_TYPE_UPSTREAM)
1193 break;
1194 parent = pci_upstream_bridge(parent);
1195 }
1196
1197 if (!parent)
1198 return NULL;
1199
1200 switch (parent->device) {
1201 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
1202 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE:
1203 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
1204 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
1205 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
1206 return parent;
1207 }
1208
1209 return NULL;
1210 }
1211
1212 static bool icm_ar_is_supported(struct tb *tb)
1213 {
1214 struct pci_dev *upstream_port;
1215 struct icm *icm = tb_priv(tb);
1216
1217 /*
1218 * Starting from Alpine Ridge we can use ICM on Apple machines
1219 * as well. We just need to reset and re-enable it first.
1220 */
1221 if (!x86_apple_machine)
1222 return true;
1223
1224 /*
1225 * Find the upstream PCIe port in case we need to do reset
1226 * through its vendor specific registers.
1227 */
1228 upstream_port = get_upstream_port(tb->nhi->pdev);
1229 if (upstream_port) {
1230 int cap;
1231
1232 cap = pci_find_ext_capability(upstream_port,
1233 PCI_EXT_CAP_ID_VNDR);
1234 if (cap > 0) {
1235 icm->upstream_port = upstream_port;
1236 icm->vnd_cap = cap;
1237
1238 return true;
1239 }
1240 }
1241
1242 return false;
1243 }
1244
1245 static int icm_ar_get_mode(struct tb *tb)
1246 {
1247 struct tb_nhi *nhi = tb->nhi;
1248 int retries = 60;
1249 u32 val;
1250
1251 do {
1252 val = ioread32(nhi->iobase + REG_FW_STS);
1253 if (val & REG_FW_STS_NVM_AUTH_DONE)
1254 break;
1255 msleep(50);
1256 } while (--retries);
1257
1258 if (!retries) {
1259 dev_err(&nhi->pdev->dev, "ICM firmware not authenticated\n");
1260 return -ENODEV;
1261 }
1262
1263 return nhi_mailbox_mode(nhi);
1264 }
1265
1266 static int
1267 icm_ar_driver_ready(struct tb *tb, enum tb_security_level *security_level,
1268 size_t *nboot_acl, bool *rpm)
1269 {
1270 struct icm_ar_pkg_driver_ready_response reply;
1271 struct icm_pkg_driver_ready request = {
1272 .hdr.code = ICM_DRIVER_READY,
1273 };
1274 int ret;
1275
1276 memset(&reply, 0, sizeof(reply));
1277 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1278 1, ICM_TIMEOUT);
1279 if (ret)
1280 return ret;
1281
1282 if (security_level)
1283 *security_level = reply.info & ICM_AR_INFO_SLEVEL_MASK;
1284 if (nboot_acl && (reply.info & ICM_AR_INFO_BOOT_ACL_SUPPORTED))
1285 *nboot_acl = (reply.info & ICM_AR_INFO_BOOT_ACL_MASK) >>
1286 ICM_AR_INFO_BOOT_ACL_SHIFT;
1287 if (rpm)
1288 *rpm = !!(reply.hdr.flags & ICM_AR_FLAGS_RTD3);
1289
1290 return 0;
1291 }
1292
1293 static int icm_ar_get_route(struct tb *tb, u8 link, u8 depth, u64 *route)
1294 {
1295 struct icm_ar_pkg_get_route_response reply;
1296 struct icm_ar_pkg_get_route request = {
1297 .hdr = { .code = ICM_GET_ROUTE },
1298 .link_info = depth << ICM_LINK_INFO_DEPTH_SHIFT | link,
1299 };
1300 int ret;
1301
1302 memset(&reply, 0, sizeof(reply));
1303 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1304 1, ICM_TIMEOUT);
1305 if (ret)
1306 return ret;
1307
1308 if (reply.hdr.flags & ICM_FLAGS_ERROR)
1309 return -EIO;
1310
1311 *route = get_route(reply.route_hi, reply.route_lo);
1312 return 0;
1313 }
1314
1315 static int icm_ar_get_boot_acl(struct tb *tb, uuid_t *uuids, size_t nuuids)
1316 {
1317 struct icm_ar_pkg_preboot_acl_response reply;
1318 struct icm_ar_pkg_preboot_acl request = {
1319 .hdr = { .code = ICM_PREBOOT_ACL },
1320 };
1321 int ret, i;
1322
1323 memset(&reply, 0, sizeof(reply));
1324 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1325 1, ICM_TIMEOUT);
1326 if (ret)
1327 return ret;
1328
1329 if (reply.hdr.flags & ICM_FLAGS_ERROR)
1330 return -EIO;
1331
1332 for (i = 0; i < nuuids; i++) {
1333 u32 *uuid = (u32 *)&uuids[i];
1334
1335 uuid[0] = reply.acl[i].uuid_lo;
1336 uuid[1] = reply.acl[i].uuid_hi;
1337
1338 if (uuid[0] == 0xffffffff && uuid[1] == 0xffffffff) {
1339 /* Map empty entries to null UUID */
1340 uuid[0] = 0;
1341 uuid[1] = 0;
1342 } else if (uuid[0] != 0 || uuid[1] != 0) {
1343 /* Upper two DWs are always one's */
1344 uuid[2] = 0xffffffff;
1345 uuid[3] = 0xffffffff;
1346 }
1347 }
1348
1349 return ret;
1350 }
1351
1352 static int icm_ar_set_boot_acl(struct tb *tb, const uuid_t *uuids,
1353 size_t nuuids)
1354 {
1355 struct icm_ar_pkg_preboot_acl_response reply;
1356 struct icm_ar_pkg_preboot_acl request = {
1357 .hdr = {
1358 .code = ICM_PREBOOT_ACL,
1359 .flags = ICM_FLAGS_WRITE,
1360 },
1361 };
1362 int ret, i;
1363
1364 for (i = 0; i < nuuids; i++) {
1365 const u32 *uuid = (const u32 *)&uuids[i];
1366
1367 if (uuid_is_null(&uuids[i])) {
1368 /*
1369 * Map null UUID to the empty (all one) entries
1370 * for ICM.
1371 */
1372 request.acl[i].uuid_lo = 0xffffffff;
1373 request.acl[i].uuid_hi = 0xffffffff;
1374 } else {
1375 /* Two high DWs need to be set to all one */
1376 if (uuid[2] != 0xffffffff || uuid[3] != 0xffffffff)
1377 return -EINVAL;
1378
1379 request.acl[i].uuid_lo = uuid[0];
1380 request.acl[i].uuid_hi = uuid[1];
1381 }
1382 }
1383
1384 memset(&reply, 0, sizeof(reply));
1385 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1386 1, ICM_TIMEOUT);
1387 if (ret)
1388 return ret;
1389
1390 if (reply.hdr.flags & ICM_FLAGS_ERROR)
1391 return -EIO;
1392
1393 return 0;
1394 }
1395
1396 static void icm_handle_notification(struct work_struct *work)
1397 {
1398 struct icm_notification *n = container_of(work, typeof(*n), work);
1399 struct tb *tb = n->tb;
1400 struct icm *icm = tb_priv(tb);
1401
1402 mutex_lock(&tb->lock);
1403
1404 /*
1405 * When the domain is stopped we flush its workqueue but before
1406 * that the root switch is removed. In that case we should treat
1407 * the queued events as being canceled.
1408 */
1409 if (tb->root_switch) {
1410 switch (n->pkg->code) {
1411 case ICM_EVENT_DEVICE_CONNECTED:
1412 icm->device_connected(tb, n->pkg);
1413 break;
1414 case ICM_EVENT_DEVICE_DISCONNECTED:
1415 icm->device_disconnected(tb, n->pkg);
1416 break;
1417 case ICM_EVENT_XDOMAIN_CONNECTED:
1418 icm->xdomain_connected(tb, n->pkg);
1419 break;
1420 case ICM_EVENT_XDOMAIN_DISCONNECTED:
1421 icm->xdomain_disconnected(tb, n->pkg);
1422 break;
1423 }
1424 }
1425
1426 mutex_unlock(&tb->lock);
1427
1428 kfree(n->pkg);
1429 kfree(n);
1430 }
1431
1432 static void icm_handle_event(struct tb *tb, enum tb_cfg_pkg_type type,
1433 const void *buf, size_t size)
1434 {
1435 struct icm_notification *n;
1436
1437 n = kmalloc(sizeof(*n), GFP_KERNEL);
1438 if (!n)
1439 return;
1440
1441 INIT_WORK(&n->work, icm_handle_notification);
1442 n->pkg = kmemdup(buf, size, GFP_KERNEL);
1443 n->tb = tb;
1444
1445 queue_work(tb->wq, &n->work);
1446 }
1447
1448 static int
1449 __icm_driver_ready(struct tb *tb, enum tb_security_level *security_level,
1450 size_t *nboot_acl, bool *rpm)
1451 {
1452 struct icm *icm = tb_priv(tb);
1453 unsigned int retries = 50;
1454 int ret;
1455
1456 ret = icm->driver_ready(tb, security_level, nboot_acl, rpm);
1457 if (ret) {
1458 tb_err(tb, "failed to send driver ready to ICM\n");
1459 return ret;
1460 }
1461
1462 /*
1463 * Hold on here until the switch config space is accessible so
1464 * that we can read root switch config successfully.
1465 */
1466 do {
1467 struct tb_cfg_result res;
1468 u32 tmp;
1469
1470 res = tb_cfg_read_raw(tb->ctl, &tmp, 0, 0, TB_CFG_SWITCH,
1471 0, 1, 100);
1472 if (!res.err)
1473 return 0;
1474
1475 msleep(50);
1476 } while (--retries);
1477
1478 tb_err(tb, "failed to read root switch config space, giving up\n");
1479 return -ETIMEDOUT;
1480 }
1481
1482 static int pci2cio_wait_completion(struct icm *icm, unsigned long timeout_msec)
1483 {
1484 unsigned long end = jiffies + msecs_to_jiffies(timeout_msec);
1485 u32 cmd;
1486
1487 do {
1488 pci_read_config_dword(icm->upstream_port,
1489 icm->vnd_cap + PCIE2CIO_CMD, &cmd);
1490 if (!(cmd & PCIE2CIO_CMD_START)) {
1491 if (cmd & PCIE2CIO_CMD_TIMEOUT)
1492 break;
1493 return 0;
1494 }
1495
1496 msleep(50);
1497 } while (time_before(jiffies, end));
1498
1499 return -ETIMEDOUT;
1500 }
1501
1502 static int pcie2cio_read(struct icm *icm, enum tb_cfg_space cs,
1503 unsigned int port, unsigned int index, u32 *data)
1504 {
1505 struct pci_dev *pdev = icm->upstream_port;
1506 int ret, vnd_cap = icm->vnd_cap;
1507 u32 cmd;
1508
1509 cmd = index;
1510 cmd |= (port << PCIE2CIO_CMD_PORT_SHIFT) & PCIE2CIO_CMD_PORT_MASK;
1511 cmd |= (cs << PCIE2CIO_CMD_CS_SHIFT) & PCIE2CIO_CMD_CS_MASK;
1512 cmd |= PCIE2CIO_CMD_START;
1513 pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_CMD, cmd);
1514
1515 ret = pci2cio_wait_completion(icm, 5000);
1516 if (ret)
1517 return ret;
1518
1519 pci_read_config_dword(pdev, vnd_cap + PCIE2CIO_RDDATA, data);
1520 return 0;
1521 }
1522
1523 static int pcie2cio_write(struct icm *icm, enum tb_cfg_space cs,
1524 unsigned int port, unsigned int index, u32 data)
1525 {
1526 struct pci_dev *pdev = icm->upstream_port;
1527 int vnd_cap = icm->vnd_cap;
1528 u32 cmd;
1529
1530 pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_WRDATA, data);
1531
1532 cmd = index;
1533 cmd |= (port << PCIE2CIO_CMD_PORT_SHIFT) & PCIE2CIO_CMD_PORT_MASK;
1534 cmd |= (cs << PCIE2CIO_CMD_CS_SHIFT) & PCIE2CIO_CMD_CS_MASK;
1535 cmd |= PCIE2CIO_CMD_WRITE | PCIE2CIO_CMD_START;
1536 pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_CMD, cmd);
1537
1538 return pci2cio_wait_completion(icm, 5000);
1539 }
1540
1541 static int icm_firmware_reset(struct tb *tb, struct tb_nhi *nhi)
1542 {
1543 struct icm *icm = tb_priv(tb);
1544 u32 val;
1545
1546 if (!icm->upstream_port)
1547 return -ENODEV;
1548
1549 /* Put ARC to wait for CIO reset event to happen */
1550 val = ioread32(nhi->iobase + REG_FW_STS);
1551 val |= REG_FW_STS_CIO_RESET_REQ;
1552 iowrite32(val, nhi->iobase + REG_FW_STS);
1553
1554 /* Re-start ARC */
1555 val = ioread32(nhi->iobase + REG_FW_STS);
1556 val |= REG_FW_STS_ICM_EN_INVERT;
1557 val |= REG_FW_STS_ICM_EN_CPU;
1558 iowrite32(val, nhi->iobase + REG_FW_STS);
1559
1560 /* Trigger CIO reset now */
1561 return pcie2cio_write(icm, TB_CFG_SWITCH, 0, 0x50, BIT(9));
1562 }
1563
1564 static int icm_firmware_start(struct tb *tb, struct tb_nhi *nhi)
1565 {
1566 unsigned int retries = 10;
1567 int ret;
1568 u32 val;
1569
1570 /* Check if the ICM firmware is already running */
1571 val = ioread32(nhi->iobase + REG_FW_STS);
1572 if (val & REG_FW_STS_ICM_EN)
1573 return 0;
1574
1575 dev_info(&nhi->pdev->dev, "starting ICM firmware\n");
1576
1577 ret = icm_firmware_reset(tb, nhi);
1578 if (ret)
1579 return ret;
1580
1581 /* Wait until the ICM firmware tells us it is up and running */
1582 do {
1583 /* Check that the ICM firmware is running */
1584 val = ioread32(nhi->iobase + REG_FW_STS);
1585 if (val & REG_FW_STS_NVM_AUTH_DONE)
1586 return 0;
1587
1588 msleep(300);
1589 } while (--retries);
1590
1591 return -ETIMEDOUT;
1592 }
1593
1594 static int icm_reset_phy_port(struct tb *tb, int phy_port)
1595 {
1596 struct icm *icm = tb_priv(tb);
1597 u32 state0, state1;
1598 int port0, port1;
1599 u32 val0, val1;
1600 int ret;
1601
1602 if (!icm->upstream_port)
1603 return 0;
1604
1605 if (phy_port) {
1606 port0 = 3;
1607 port1 = 4;
1608 } else {
1609 port0 = 1;
1610 port1 = 2;
1611 }
1612
1613 /*
1614 * Read link status of both null ports belonging to a single
1615 * physical port.
1616 */
1617 ret = pcie2cio_read(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, &val0);
1618 if (ret)
1619 return ret;
1620 ret = pcie2cio_read(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, &val1);
1621 if (ret)
1622 return ret;
1623
1624 state0 = val0 & PHY_PORT_CS1_LINK_STATE_MASK;
1625 state0 >>= PHY_PORT_CS1_LINK_STATE_SHIFT;
1626 state1 = val1 & PHY_PORT_CS1_LINK_STATE_MASK;
1627 state1 >>= PHY_PORT_CS1_LINK_STATE_SHIFT;
1628
1629 /* If they are both up we need to reset them now */
1630 if (state0 != TB_PORT_UP || state1 != TB_PORT_UP)
1631 return 0;
1632
1633 val0 |= PHY_PORT_CS1_LINK_DISABLE;
1634 ret = pcie2cio_write(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, val0);
1635 if (ret)
1636 return ret;
1637
1638 val1 |= PHY_PORT_CS1_LINK_DISABLE;
1639 ret = pcie2cio_write(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, val1);
1640 if (ret)
1641 return ret;
1642
1643 /* Wait a bit and then re-enable both ports */
1644 usleep_range(10, 100);
1645
1646 ret = pcie2cio_read(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, &val0);
1647 if (ret)
1648 return ret;
1649 ret = pcie2cio_read(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, &val1);
1650 if (ret)
1651 return ret;
1652
1653 val0 &= ~PHY_PORT_CS1_LINK_DISABLE;
1654 ret = pcie2cio_write(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, val0);
1655 if (ret)
1656 return ret;
1657
1658 val1 &= ~PHY_PORT_CS1_LINK_DISABLE;
1659 return pcie2cio_write(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, val1);
1660 }
1661
1662 static int icm_firmware_init(struct tb *tb)
1663 {
1664 struct icm *icm = tb_priv(tb);
1665 struct tb_nhi *nhi = tb->nhi;
1666 int ret;
1667
1668 ret = icm_firmware_start(tb, nhi);
1669 if (ret) {
1670 dev_err(&nhi->pdev->dev, "could not start ICM firmware\n");
1671 return ret;
1672 }
1673
1674 if (icm->get_mode) {
1675 ret = icm->get_mode(tb);
1676
1677 switch (ret) {
1678 case NHI_FW_SAFE_MODE:
1679 icm->safe_mode = true;
1680 break;
1681
1682 case NHI_FW_CM_MODE:
1683 /* Ask ICM to accept all Thunderbolt devices */
1684 nhi_mailbox_cmd(nhi, NHI_MAILBOX_ALLOW_ALL_DEVS, 0);
1685 break;
1686
1687 default:
1688 if (ret < 0)
1689 return ret;
1690
1691 tb_err(tb, "ICM firmware is in wrong mode: %u\n", ret);
1692 return -ENODEV;
1693 }
1694 }
1695
1696 /*
1697 * Reset both physical ports if there is anything connected to
1698 * them already.
1699 */
1700 ret = icm_reset_phy_port(tb, 0);
1701 if (ret)
1702 dev_warn(&nhi->pdev->dev, "failed to reset links on port0\n");
1703 ret = icm_reset_phy_port(tb, 1);
1704 if (ret)
1705 dev_warn(&nhi->pdev->dev, "failed to reset links on port1\n");
1706
1707 return 0;
1708 }
1709
1710 static int icm_driver_ready(struct tb *tb)
1711 {
1712 struct icm *icm = tb_priv(tb);
1713 int ret;
1714
1715 ret = icm_firmware_init(tb);
1716 if (ret)
1717 return ret;
1718
1719 if (icm->safe_mode) {
1720 tb_info(tb, "Thunderbolt host controller is in safe mode.\n");
1721 tb_info(tb, "You need to update NVM firmware of the controller before it can be used.\n");
1722 tb_info(tb, "For latest updates check https://thunderbolttechnology.net/updates.\n");
1723 return 0;
1724 }
1725
1726 ret = __icm_driver_ready(tb, &tb->security_level, &tb->nboot_acl,
1727 &icm->rpm);
1728 if (ret)
1729 return ret;
1730
1731 /*
1732 * Make sure the number of supported preboot ACL matches what we
1733 * expect or disable the whole feature.
1734 */
1735 if (tb->nboot_acl > icm->max_boot_acl)
1736 tb->nboot_acl = 0;
1737
1738 return 0;
1739 }
1740
1741 static int icm_suspend(struct tb *tb)
1742 {
1743 struct icm *icm = tb_priv(tb);
1744
1745 if (icm->save_devices)
1746 icm->save_devices(tb);
1747
1748 nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0);
1749 return 0;
1750 }
1751
1752 /*
1753 * Mark all switches (except root switch) below this one unplugged. ICM
1754 * firmware will send us an updated list of switches after we have send
1755 * it driver ready command. If a switch is not in that list it will be
1756 * removed when we perform rescan.
1757 */
1758 static void icm_unplug_children(struct tb_switch *sw)
1759 {
1760 unsigned int i;
1761
1762 if (tb_route(sw))
1763 sw->is_unplugged = true;
1764
1765 for (i = 1; i <= sw->config.max_port_number; i++) {
1766 struct tb_port *port = &sw->ports[i];
1767
1768 if (tb_is_upstream_port(port))
1769 continue;
1770 if (port->xdomain) {
1771 port->xdomain->is_unplugged = true;
1772 continue;
1773 }
1774 if (!port->remote)
1775 continue;
1776
1777 icm_unplug_children(port->remote->sw);
1778 }
1779 }
1780
1781 static void icm_free_unplugged_children(struct tb_switch *sw)
1782 {
1783 unsigned int i;
1784
1785 for (i = 1; i <= sw->config.max_port_number; i++) {
1786 struct tb_port *port = &sw->ports[i];
1787
1788 if (tb_is_upstream_port(port))
1789 continue;
1790
1791 if (port->xdomain && port->xdomain->is_unplugged) {
1792 tb_xdomain_remove(port->xdomain);
1793 port->xdomain = NULL;
1794 continue;
1795 }
1796
1797 if (!port->remote)
1798 continue;
1799
1800 if (port->remote->sw->is_unplugged) {
1801 tb_switch_remove(port->remote->sw);
1802 port->remote = NULL;
1803 } else {
1804 icm_free_unplugged_children(port->remote->sw);
1805 }
1806 }
1807 }
1808
1809 static void icm_rescan_work(struct work_struct *work)
1810 {
1811 struct icm *icm = container_of(work, struct icm, rescan_work.work);
1812 struct tb *tb = icm_to_tb(icm);
1813
1814 mutex_lock(&tb->lock);
1815 if (tb->root_switch)
1816 icm_free_unplugged_children(tb->root_switch);
1817 mutex_unlock(&tb->lock);
1818 }
1819
1820 static void icm_complete(struct tb *tb)
1821 {
1822 struct icm *icm = tb_priv(tb);
1823
1824 if (tb->nhi->going_away)
1825 return;
1826
1827 icm_unplug_children(tb->root_switch);
1828
1829 /*
1830 * Now all existing children should be resumed, start events
1831 * from ICM to get updated status.
1832 */
1833 __icm_driver_ready(tb, NULL, NULL, NULL);
1834
1835 /*
1836 * We do not get notifications of devices that have been
1837 * unplugged during suspend so schedule rescan to clean them up
1838 * if any.
1839 */
1840 queue_delayed_work(tb->wq, &icm->rescan_work, msecs_to_jiffies(500));
1841 }
1842
1843 static int icm_runtime_suspend(struct tb *tb)
1844 {
1845 nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0);
1846 return 0;
1847 }
1848
1849 static int icm_runtime_resume(struct tb *tb)
1850 {
1851 /*
1852 * We can reuse the same resume functionality than with system
1853 * suspend.
1854 */
1855 icm_complete(tb);
1856 return 0;
1857 }
1858
1859 static int icm_start(struct tb *tb)
1860 {
1861 struct icm *icm = tb_priv(tb);
1862 int ret;
1863
1864 if (icm->safe_mode)
1865 tb->root_switch = tb_switch_alloc_safe_mode(tb, &tb->dev, 0);
1866 else
1867 tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0);
1868 if (!tb->root_switch)
1869 return -ENODEV;
1870
1871 /*
1872 * NVM upgrade has not been tested on Apple systems and they
1873 * don't provide images publicly either. To be on the safe side
1874 * prevent root switch NVM upgrade on Macs for now.
1875 */
1876 tb->root_switch->no_nvm_upgrade = x86_apple_machine;
1877 tb->root_switch->rpm = icm->rpm;
1878
1879 ret = tb_switch_add(tb->root_switch);
1880 if (ret) {
1881 tb_switch_put(tb->root_switch);
1882 tb->root_switch = NULL;
1883 }
1884
1885 return ret;
1886 }
1887
1888 static void icm_stop(struct tb *tb)
1889 {
1890 struct icm *icm = tb_priv(tb);
1891
1892 cancel_delayed_work(&icm->rescan_work);
1893 tb_switch_remove(tb->root_switch);
1894 tb->root_switch = NULL;
1895 nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0);
1896 }
1897
1898 static int icm_disconnect_pcie_paths(struct tb *tb)
1899 {
1900 return nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DISCONNECT_PCIE_PATHS, 0);
1901 }
1902
1903 /* Falcon Ridge */
1904 static const struct tb_cm_ops icm_fr_ops = {
1905 .driver_ready = icm_driver_ready,
1906 .start = icm_start,
1907 .stop = icm_stop,
1908 .suspend = icm_suspend,
1909 .complete = icm_complete,
1910 .handle_event = icm_handle_event,
1911 .approve_switch = icm_fr_approve_switch,
1912 .add_switch_key = icm_fr_add_switch_key,
1913 .challenge_switch_key = icm_fr_challenge_switch_key,
1914 .disconnect_pcie_paths = icm_disconnect_pcie_paths,
1915 .approve_xdomain_paths = icm_fr_approve_xdomain_paths,
1916 .disconnect_xdomain_paths = icm_fr_disconnect_xdomain_paths,
1917 };
1918
1919 /* Alpine Ridge */
1920 static const struct tb_cm_ops icm_ar_ops = {
1921 .driver_ready = icm_driver_ready,
1922 .start = icm_start,
1923 .stop = icm_stop,
1924 .suspend = icm_suspend,
1925 .complete = icm_complete,
1926 .runtime_suspend = icm_runtime_suspend,
1927 .runtime_resume = icm_runtime_resume,
1928 .handle_event = icm_handle_event,
1929 .get_boot_acl = icm_ar_get_boot_acl,
1930 .set_boot_acl = icm_ar_set_boot_acl,
1931 .approve_switch = icm_fr_approve_switch,
1932 .add_switch_key = icm_fr_add_switch_key,
1933 .challenge_switch_key = icm_fr_challenge_switch_key,
1934 .disconnect_pcie_paths = icm_disconnect_pcie_paths,
1935 .approve_xdomain_paths = icm_fr_approve_xdomain_paths,
1936 .disconnect_xdomain_paths = icm_fr_disconnect_xdomain_paths,
1937 };
1938
1939 /* Titan Ridge */
1940 static const struct tb_cm_ops icm_tr_ops = {
1941 .driver_ready = icm_driver_ready,
1942 .start = icm_start,
1943 .stop = icm_stop,
1944 .suspend = icm_suspend,
1945 .complete = icm_complete,
1946 .runtime_suspend = icm_runtime_suspend,
1947 .runtime_resume = icm_runtime_resume,
1948 .handle_event = icm_handle_event,
1949 .get_boot_acl = icm_ar_get_boot_acl,
1950 .set_boot_acl = icm_ar_set_boot_acl,
1951 .approve_switch = icm_tr_approve_switch,
1952 .add_switch_key = icm_tr_add_switch_key,
1953 .challenge_switch_key = icm_tr_challenge_switch_key,
1954 .disconnect_pcie_paths = icm_disconnect_pcie_paths,
1955 .approve_xdomain_paths = icm_tr_approve_xdomain_paths,
1956 .disconnect_xdomain_paths = icm_tr_disconnect_xdomain_paths,
1957 };
1958
1959 struct tb *icm_probe(struct tb_nhi *nhi)
1960 {
1961 struct icm *icm;
1962 struct tb *tb;
1963
1964 tb = tb_domain_alloc(nhi, sizeof(struct icm));
1965 if (!tb)
1966 return NULL;
1967
1968 icm = tb_priv(tb);
1969 INIT_DELAYED_WORK(&icm->rescan_work, icm_rescan_work);
1970 mutex_init(&icm->request_lock);
1971
1972 switch (nhi->pdev->device) {
1973 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI:
1974 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI:
1975 icm->is_supported = icm_fr_is_supported;
1976 icm->get_route = icm_fr_get_route;
1977 icm->save_devices = icm_fr_save_devices;
1978 icm->driver_ready = icm_fr_driver_ready;
1979 icm->device_connected = icm_fr_device_connected;
1980 icm->device_disconnected = icm_fr_device_disconnected;
1981 icm->xdomain_connected = icm_fr_xdomain_connected;
1982 icm->xdomain_disconnected = icm_fr_xdomain_disconnected;
1983 tb->cm_ops = &icm_fr_ops;
1984 break;
1985
1986 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_NHI:
1987 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_NHI:
1988 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_NHI:
1989 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_NHI:
1990 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_NHI:
1991 icm->max_boot_acl = ICM_AR_PREBOOT_ACL_ENTRIES;
1992 icm->is_supported = icm_ar_is_supported;
1993 icm->get_mode = icm_ar_get_mode;
1994 icm->get_route = icm_ar_get_route;
1995 icm->save_devices = icm_fr_save_devices;
1996 icm->driver_ready = icm_ar_driver_ready;
1997 icm->device_connected = icm_fr_device_connected;
1998 icm->device_disconnected = icm_fr_device_disconnected;
1999 icm->xdomain_connected = icm_fr_xdomain_connected;
2000 icm->xdomain_disconnected = icm_fr_xdomain_disconnected;
2001 tb->cm_ops = &icm_ar_ops;
2002 break;
2003
2004 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_NHI:
2005 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_NHI:
2006 icm->max_boot_acl = ICM_AR_PREBOOT_ACL_ENTRIES;
2007 icm->is_supported = icm_ar_is_supported;
2008 icm->get_mode = icm_ar_get_mode;
2009 icm->driver_ready = icm_tr_driver_ready;
2010 icm->device_connected = icm_tr_device_connected;
2011 icm->device_disconnected = icm_tr_device_disconnected;
2012 icm->xdomain_connected = icm_tr_xdomain_connected;
2013 icm->xdomain_disconnected = icm_tr_xdomain_disconnected;
2014 tb->cm_ops = &icm_tr_ops;
2015 break;
2016 }
2017
2018 if (!icm->is_supported || !icm->is_supported(tb)) {
2019 dev_dbg(&nhi->pdev->dev, "ICM not supported on this controller\n");
2020 tb_domain_put(tb);
2021 return NULL;
2022 }
2023
2024 return tb;
2025 }
Linux with added FPC-III support