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[cor.git] / drivers / thunderbolt / icm.c
blob13e88109742e6ff641bca422f1a926d7a76562f7
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Internal Thunderbolt Connection Manager. This is a firmware running on
4 * the Thunderbolt host controller performing most of the low-level
5 * handling.
6 *
7 * Copyright (C) 2017, Intel Corporation
8 * Authors: Michael Jamet <michael.jamet@intel.com>
9 * Mika Westerberg <mika.westerberg@linux.intel.com>
10 */
11
12 #include <linux/delay.h>
13 #include <linux/mutex.h>
14 #include <linux/moduleparam.h>
15 #include <linux/pci.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/platform_data/x86/apple.h>
18 #include <linux/sizes.h>
19 #include <linux/slab.h>
20 #include <linux/workqueue.h>
21
22 #include "ctl.h"
23 #include "nhi_regs.h"
24 #include "tb.h"
25
26 #define PCIE2CIO_CMD 0x30
27 #define PCIE2CIO_CMD_TIMEOUT BIT(31)
28 #define PCIE2CIO_CMD_START BIT(30)
29 #define PCIE2CIO_CMD_WRITE BIT(21)
30 #define PCIE2CIO_CMD_CS_MASK GENMASK(20, 19)
31 #define PCIE2CIO_CMD_CS_SHIFT 19
32 #define PCIE2CIO_CMD_PORT_MASK GENMASK(18, 13)
33 #define PCIE2CIO_CMD_PORT_SHIFT 13
34
35 #define PCIE2CIO_WRDATA 0x34
36 #define PCIE2CIO_RDDATA 0x38
37
38 #define PHY_PORT_CS1 0x37
39 #define PHY_PORT_CS1_LINK_DISABLE BIT(14)
40 #define PHY_PORT_CS1_LINK_STATE_MASK GENMASK(29, 26)
41 #define PHY_PORT_CS1_LINK_STATE_SHIFT 26
42
43 #define ICM_TIMEOUT 5000 /* ms */
44 #define ICM_APPROVE_TIMEOUT 10000 /* ms */
45 #define ICM_MAX_LINK 4
46
47 static bool start_icm;
48 module_param(start_icm, bool, 0444);
49 MODULE_PARM_DESC(start_icm, "start ICM firmware if it is not running (default: false)");
50
51 /**
52 * struct icm - Internal connection manager private data
53 * @request_lock: Makes sure only one message is send to ICM at time
54 * @rescan_work: Work used to rescan the surviving switches after resume
55 * @upstream_port: Pointer to the PCIe upstream port this host
56 * controller is connected. This is only set for systems
57 * where ICM needs to be started manually
58 * @vnd_cap: Vendor defined capability where PCIe2CIO mailbox resides
59 * (only set when @upstream_port is not %NULL)
60 * @safe_mode: ICM is in safe mode
61 * @max_boot_acl: Maximum number of preboot ACL entries (%0 if not supported)
62 * @rpm: Does the controller support runtime PM (RTD3)
63 * @can_upgrade_nvm: Can the NVM firmware be upgrade on this controller
64 * @veto: Is RTD3 veto in effect
65 * @is_supported: Checks if we can support ICM on this controller
66 * @cio_reset: Trigger CIO reset
67 * @get_mode: Read and return the ICM firmware mode (optional)
68 * @get_route: Find a route string for given switch
69 * @save_devices: Ask ICM to save devices to ACL when suspending (optional)
70 * @driver_ready: Send driver ready message to ICM
71 * @set_uuid: Set UUID for the root switch (optional)
72 * @device_connected: Handle device connected ICM message
73 * @device_disconnected: Handle device disconnected ICM message
74 * @xdomain_connected - Handle XDomain connected ICM message
75 * @xdomain_disconnected - Handle XDomain disconnected ICM message
76 * @rtd3_veto: Handle RTD3 veto notification ICM message
77 */
78 struct icm {
79 struct mutex request_lock;
80 struct delayed_work rescan_work;
81 struct pci_dev *upstream_port;
82 size_t max_boot_acl;
83 int vnd_cap;
84 bool safe_mode;
85 bool rpm;
86 bool can_upgrade_nvm;
87 bool veto;
88 bool (*is_supported)(struct tb *tb);
89 int (*cio_reset)(struct tb *tb);
90 int (*get_mode)(struct tb *tb);
91 int (*get_route)(struct tb *tb, u8 link, u8 depth, u64 *route);
92 void (*save_devices)(struct tb *tb);
93 int (*driver_ready)(struct tb *tb,
94 enum tb_security_level *security_level,
95 size_t *nboot_acl, bool *rpm);
96 void (*set_uuid)(struct tb *tb);
97 void (*device_connected)(struct tb *tb,
98 const struct icm_pkg_header *hdr);
99 void (*device_disconnected)(struct tb *tb,
100 const struct icm_pkg_header *hdr);
101 void (*xdomain_connected)(struct tb *tb,
102 const struct icm_pkg_header *hdr);
103 void (*xdomain_disconnected)(struct tb *tb,
104 const struct icm_pkg_header *hdr);
105 void (*rtd3_veto)(struct tb *tb, const struct icm_pkg_header *hdr);
106 };
107
108 struct icm_notification {
109 struct work_struct work;
110 struct icm_pkg_header *pkg;
111 struct tb *tb;
112 };
113
114 struct ep_name_entry {
115 u8 len;
116 u8 type;
117 u8 data[0];
118 };
119
120 #define EP_NAME_INTEL_VSS 0x10
121
122 /* Intel Vendor specific structure */
123 struct intel_vss {
124 u16 vendor;
125 u16 model;
126 u8 mc;
127 u8 flags;
128 u16 pci_devid;
129 u32 nvm_version;
130 };
131
132 #define INTEL_VSS_FLAGS_RTD3 BIT(0)
133
134 static const struct intel_vss *parse_intel_vss(const void *ep_name, size_t size)
135 {
136 const void *end = ep_name + size;
137
138 while (ep_name < end) {
139 const struct ep_name_entry *ep = ep_name;
140
141 if (!ep->len)
142 break;
143 if (ep_name + ep->len > end)
144 break;
145
146 if (ep->type == EP_NAME_INTEL_VSS)
147 return (const struct intel_vss *)ep->data;
148
149 ep_name += ep->len;
150 }
151
152 return NULL;
153 }
154
155 static bool intel_vss_is_rtd3(const void *ep_name, size_t size)
156 {
157 const struct intel_vss *vss;
158
159 vss = parse_intel_vss(ep_name, size);
160 if (vss)
161 return !!(vss->flags & INTEL_VSS_FLAGS_RTD3);
162
163 return false;
164 }
165
166 static inline struct tb *icm_to_tb(struct icm *icm)
167 {
168 return ((void *)icm - sizeof(struct tb));
169 }
170
171 static inline u8 phy_port_from_route(u64 route, u8 depth)
172 {
173 u8 link;
174
175 link = depth ? route >> ((depth - 1) * 8) : route;
176 return tb_phy_port_from_link(link);
177 }
178
179 static inline u8 dual_link_from_link(u8 link)
180 {
181 return link ? ((link - 1) ^ 0x01) + 1 : 0;
182 }
183
184 static inline u64 get_route(u32 route_hi, u32 route_lo)
185 {
186 return (u64)route_hi << 32 | route_lo;
187 }
188
189 static inline u64 get_parent_route(u64 route)
190 {
191 int depth = tb_route_length(route);
192 return depth ? route & ~(0xffULL << (depth - 1) * TB_ROUTE_SHIFT) : 0;
193 }
194
195 static int pci2cio_wait_completion(struct icm *icm, unsigned long timeout_msec)
196 {
197 unsigned long end = jiffies + msecs_to_jiffies(timeout_msec);
198 u32 cmd;
199
200 do {
201 pci_read_config_dword(icm->upstream_port,
202 icm->vnd_cap + PCIE2CIO_CMD, &cmd);
203 if (!(cmd & PCIE2CIO_CMD_START)) {
204 if (cmd & PCIE2CIO_CMD_TIMEOUT)
205 break;
206 return 0;
207 }
208
209 msleep(50);
210 } while (time_before(jiffies, end));
211
212 return -ETIMEDOUT;
213 }
214
215 static int pcie2cio_read(struct icm *icm, enum tb_cfg_space cs,
216 unsigned int port, unsigned int index, u32 *data)
217 {
218 struct pci_dev *pdev = icm->upstream_port;
219 int ret, vnd_cap = icm->vnd_cap;
220 u32 cmd;
221
222 cmd = index;
223 cmd |= (port << PCIE2CIO_CMD_PORT_SHIFT) & PCIE2CIO_CMD_PORT_MASK;
224 cmd |= (cs << PCIE2CIO_CMD_CS_SHIFT) & PCIE2CIO_CMD_CS_MASK;
225 cmd |= PCIE2CIO_CMD_START;
226 pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_CMD, cmd);
227
228 ret = pci2cio_wait_completion(icm, 5000);
229 if (ret)
230 return ret;
231
232 pci_read_config_dword(pdev, vnd_cap + PCIE2CIO_RDDATA, data);
233 return 0;
234 }
235
236 static int pcie2cio_write(struct icm *icm, enum tb_cfg_space cs,
237 unsigned int port, unsigned int index, u32 data)
238 {
239 struct pci_dev *pdev = icm->upstream_port;
240 int vnd_cap = icm->vnd_cap;
241 u32 cmd;
242
243 pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_WRDATA, data);
244
245 cmd = index;
246 cmd |= (port << PCIE2CIO_CMD_PORT_SHIFT) & PCIE2CIO_CMD_PORT_MASK;
247 cmd |= (cs << PCIE2CIO_CMD_CS_SHIFT) & PCIE2CIO_CMD_CS_MASK;
248 cmd |= PCIE2CIO_CMD_WRITE | PCIE2CIO_CMD_START;
249 pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_CMD, cmd);
250
251 return pci2cio_wait_completion(icm, 5000);
252 }
253
254 static bool icm_match(const struct tb_cfg_request *req,
255 const struct ctl_pkg *pkg)
256 {
257 const struct icm_pkg_header *res_hdr = pkg->buffer;
258 const struct icm_pkg_header *req_hdr = req->request;
259
260 if (pkg->frame.eof != req->response_type)
261 return false;
262 if (res_hdr->code != req_hdr->code)
263 return false;
264
265 return true;
266 }
267
268 static bool icm_copy(struct tb_cfg_request *req, const struct ctl_pkg *pkg)
269 {
270 const struct icm_pkg_header *hdr = pkg->buffer;
271
272 if (hdr->packet_id < req->npackets) {
273 size_t offset = hdr->packet_id * req->response_size;
274
275 memcpy(req->response + offset, pkg->buffer, req->response_size);
276 }
277
278 return hdr->packet_id == hdr->total_packets - 1;
279 }
280
281 static int icm_request(struct tb *tb, const void *request, size_t request_size,
282 void *response, size_t response_size, size_t npackets,
283 unsigned int timeout_msec)
284 {
285 struct icm *icm = tb_priv(tb);
286 int retries = 3;
287
288 do {
289 struct tb_cfg_request *req;
290 struct tb_cfg_result res;
291
292 req = tb_cfg_request_alloc();
293 if (!req)
294 return -ENOMEM;
295
296 req->match = icm_match;
297 req->copy = icm_copy;
298 req->request = request;
299 req->request_size = request_size;
300 req->request_type = TB_CFG_PKG_ICM_CMD;
301 req->response = response;
302 req->npackets = npackets;
303 req->response_size = response_size;
304 req->response_type = TB_CFG_PKG_ICM_RESP;
305
306 mutex_lock(&icm->request_lock);
307 res = tb_cfg_request_sync(tb->ctl, req, timeout_msec);
308 mutex_unlock(&icm->request_lock);
309
310 tb_cfg_request_put(req);
311
312 if (res.err != -ETIMEDOUT)
313 return res.err == 1 ? -EIO : res.err;
314
315 usleep_range(20, 50);
316 } while (retries--);
317
318 return -ETIMEDOUT;
319 }
320
321 /*
322 * If rescan is queued to run (we are resuming), postpone it to give the
323 * firmware some more time to send device connected notifications for next
324 * devices in the chain.
325 */
326 static void icm_postpone_rescan(struct tb *tb)
327 {
328 struct icm *icm = tb_priv(tb);
329
330 if (delayed_work_pending(&icm->rescan_work))
331 mod_delayed_work(tb->wq, &icm->rescan_work,
332 msecs_to_jiffies(500));
333 }
334
335 static void icm_veto_begin(struct tb *tb)
336 {
337 struct icm *icm = tb_priv(tb);
338
339 if (!icm->veto) {
340 icm->veto = true;
341 /* Keep the domain powered while veto is in effect */
342 pm_runtime_get(&tb->dev);
343 }
344 }
345
346 static void icm_veto_end(struct tb *tb)
347 {
348 struct icm *icm = tb_priv(tb);
349
350 if (icm->veto) {
351 icm->veto = false;
352 /* Allow the domain suspend now */
353 pm_runtime_mark_last_busy(&tb->dev);
354 pm_runtime_put_autosuspend(&tb->dev);
355 }
356 }
357
358 static bool icm_firmware_running(const struct tb_nhi *nhi)
359 {
360 u32 val;
361
362 val = ioread32(nhi->iobase + REG_FW_STS);
363 return !!(val & REG_FW_STS_ICM_EN);
364 }
365
366 static bool icm_fr_is_supported(struct tb *tb)
367 {
368 return !x86_apple_machine;
369 }
370
371 static inline int icm_fr_get_switch_index(u32 port)
372 {
373 int index;
374
375 if ((port & ICM_PORT_TYPE_MASK) != TB_TYPE_PORT)
376 return 0;
377
378 index = port >> ICM_PORT_INDEX_SHIFT;
379 return index != 0xff ? index : 0;
380 }
381
382 static int icm_fr_get_route(struct tb *tb, u8 link, u8 depth, u64 *route)
383 {
384 struct icm_fr_pkg_get_topology_response *switches, *sw;
385 struct icm_fr_pkg_get_topology request = {
386 .hdr = { .code = ICM_GET_TOPOLOGY },
387 };
388 size_t npackets = ICM_GET_TOPOLOGY_PACKETS;
389 int ret, index;
390 u8 i;
391
392 switches = kcalloc(npackets, sizeof(*switches), GFP_KERNEL);
393 if (!switches)
394 return -ENOMEM;
395
396 ret = icm_request(tb, &request, sizeof(request), switches,
397 sizeof(*switches), npackets, ICM_TIMEOUT);
398 if (ret)
399 goto err_free;
400
401 sw = &switches[0];
402 index = icm_fr_get_switch_index(sw->ports[link]);
403 if (!index) {
404 ret = -ENODEV;
405 goto err_free;
406 }
407
408 sw = &switches[index];
409 for (i = 1; i < depth; i++) {
410 unsigned int j;
411
412 if (!(sw->first_data & ICM_SWITCH_USED)) {
413 ret = -ENODEV;
414 goto err_free;
415 }
416
417 for (j = 0; j < ARRAY_SIZE(sw->ports); j++) {
418 index = icm_fr_get_switch_index(sw->ports[j]);
419 if (index > sw->switch_index) {
420 sw = &switches[index];
421 break;
422 }
423 }
424 }
425
426 *route = get_route(sw->route_hi, sw->route_lo);
427
428 err_free:
429 kfree(switches);
430 return ret;
431 }
432
433 static void icm_fr_save_devices(struct tb *tb)
434 {
435 nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_SAVE_DEVS, 0);
436 }
437
438 static int
439 icm_fr_driver_ready(struct tb *tb, enum tb_security_level *security_level,
440 size_t *nboot_acl, bool *rpm)
441 {
442 struct icm_fr_pkg_driver_ready_response reply;
443 struct icm_pkg_driver_ready request = {
444 .hdr.code = ICM_DRIVER_READY,
445 };
446 int ret;
447
448 memset(&reply, 0, sizeof(reply));
449 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
450 1, ICM_TIMEOUT);
451 if (ret)
452 return ret;
453
454 if (security_level)
455 *security_level = reply.security_level & ICM_FR_SLEVEL_MASK;
456
457 return 0;
458 }
459
460 static int icm_fr_approve_switch(struct tb *tb, struct tb_switch *sw)
461 {
462 struct icm_fr_pkg_approve_device request;
463 struct icm_fr_pkg_approve_device reply;
464 int ret;
465
466 memset(&request, 0, sizeof(request));
467 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
468 request.hdr.code = ICM_APPROVE_DEVICE;
469 request.connection_id = sw->connection_id;
470 request.connection_key = sw->connection_key;
471
472 memset(&reply, 0, sizeof(reply));
473 /* Use larger timeout as establishing tunnels can take some time */
474 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
475 1, ICM_APPROVE_TIMEOUT);
476 if (ret)
477 return ret;
478
479 if (reply.hdr.flags & ICM_FLAGS_ERROR) {
480 tb_warn(tb, "PCIe tunnel creation failed\n");
481 return -EIO;
482 }
483
484 return 0;
485 }
486
487 static int icm_fr_add_switch_key(struct tb *tb, struct tb_switch *sw)
488 {
489 struct icm_fr_pkg_add_device_key request;
490 struct icm_fr_pkg_add_device_key_response reply;
491 int ret;
492
493 memset(&request, 0, sizeof(request));
494 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
495 request.hdr.code = ICM_ADD_DEVICE_KEY;
496 request.connection_id = sw->connection_id;
497 request.connection_key = sw->connection_key;
498 memcpy(request.key, sw->key, TB_SWITCH_KEY_SIZE);
499
500 memset(&reply, 0, sizeof(reply));
501 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
502 1, ICM_TIMEOUT);
503 if (ret)
504 return ret;
505
506 if (reply.hdr.flags & ICM_FLAGS_ERROR) {
507 tb_warn(tb, "Adding key to switch failed\n");
508 return -EIO;
509 }
510
511 return 0;
512 }
513
514 static int icm_fr_challenge_switch_key(struct tb *tb, struct tb_switch *sw,
515 const u8 *challenge, u8 *response)
516 {
517 struct icm_fr_pkg_challenge_device request;
518 struct icm_fr_pkg_challenge_device_response reply;
519 int ret;
520
521 memset(&request, 0, sizeof(request));
522 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
523 request.hdr.code = ICM_CHALLENGE_DEVICE;
524 request.connection_id = sw->connection_id;
525 request.connection_key = sw->connection_key;
526 memcpy(request.challenge, challenge, TB_SWITCH_KEY_SIZE);
527
528 memset(&reply, 0, sizeof(reply));
529 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
530 1, ICM_TIMEOUT);
531 if (ret)
532 return ret;
533
534 if (reply.hdr.flags & ICM_FLAGS_ERROR)
535 return -EKEYREJECTED;
536 if (reply.hdr.flags & ICM_FLAGS_NO_KEY)
537 return -ENOKEY;
538
539 memcpy(response, reply.response, TB_SWITCH_KEY_SIZE);
540
541 return 0;
542 }
543
544 static int icm_fr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
545 {
546 struct icm_fr_pkg_approve_xdomain_response reply;
547 struct icm_fr_pkg_approve_xdomain request;
548 int ret;
549
550 memset(&request, 0, sizeof(request));
551 request.hdr.code = ICM_APPROVE_XDOMAIN;
552 request.link_info = xd->depth << ICM_LINK_INFO_DEPTH_SHIFT | xd->link;
553 memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid));
554
555 request.transmit_path = xd->transmit_path;
556 request.transmit_ring = xd->transmit_ring;
557 request.receive_path = xd->receive_path;
558 request.receive_ring = xd->receive_ring;
559
560 memset(&reply, 0, sizeof(reply));
561 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
562 1, ICM_TIMEOUT);
563 if (ret)
564 return ret;
565
566 if (reply.hdr.flags & ICM_FLAGS_ERROR)
567 return -EIO;
568
569 return 0;
570 }
571
572 static int icm_fr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
573 {
574 u8 phy_port;
575 u8 cmd;
576
577 phy_port = tb_phy_port_from_link(xd->link);
578 if (phy_port == 0)
579 cmd = NHI_MAILBOX_DISCONNECT_PA;
580 else
581 cmd = NHI_MAILBOX_DISCONNECT_PB;
582
583 nhi_mailbox_cmd(tb->nhi, cmd, 1);
584 usleep_range(10, 50);
585 nhi_mailbox_cmd(tb->nhi, cmd, 2);
586 return 0;
587 }
588
589 static struct tb_switch *alloc_switch(struct tb_switch *parent_sw, u64 route,
590 const uuid_t *uuid)
591 {
592 struct tb *tb = parent_sw->tb;
593 struct tb_switch *sw;
594
595 sw = tb_switch_alloc(tb, &parent_sw->dev, route);
596 if (IS_ERR(sw)) {
597 tb_warn(tb, "failed to allocate switch at %llx\n", route);
598 return sw;
599 }
600
601 sw->uuid = kmemdup(uuid, sizeof(*uuid), GFP_KERNEL);
602 if (!sw->uuid) {
603 tb_switch_put(sw);
604 return ERR_PTR(-ENOMEM);
605 }
606
607 init_completion(&sw->rpm_complete);
608 return sw;
609 }
610
611 static int add_switch(struct tb_switch *parent_sw, struct tb_switch *sw)
612 {
613 u64 route = tb_route(sw);
614 int ret;
615
616 /* Link the two switches now */
617 tb_port_at(route, parent_sw)->remote = tb_upstream_port(sw);
618 tb_upstream_port(sw)->remote = tb_port_at(route, parent_sw);
619
620 ret = tb_switch_add(sw);
621 if (ret)
622 tb_port_at(tb_route(sw), parent_sw)->remote = NULL;
623
624 return ret;
625 }
626
627 static void update_switch(struct tb_switch *parent_sw, struct tb_switch *sw,
628 u64 route, u8 connection_id, u8 connection_key,
629 u8 link, u8 depth, bool boot)
630 {
631 /* Disconnect from parent */
632 tb_port_at(tb_route(sw), parent_sw)->remote = NULL;
633 /* Re-connect via updated port*/
634 tb_port_at(route, parent_sw)->remote = tb_upstream_port(sw);
635
636 /* Update with the new addressing information */
637 sw->config.route_hi = upper_32_bits(route);
638 sw->config.route_lo = lower_32_bits(route);
639 sw->connection_id = connection_id;
640 sw->connection_key = connection_key;
641 sw->link = link;
642 sw->depth = depth;
643 sw->boot = boot;
644
645 /* This switch still exists */
646 sw->is_unplugged = false;
647
648 /* Runtime resume is now complete */
649 complete(&sw->rpm_complete);
650 }
651
652 static void remove_switch(struct tb_switch *sw)
653 {
654 struct tb_switch *parent_sw;
655
656 parent_sw = tb_to_switch(sw->dev.parent);
657 tb_port_at(tb_route(sw), parent_sw)->remote = NULL;
658 tb_switch_remove(sw);
659 }
660
661 static void add_xdomain(struct tb_switch *sw, u64 route,
662 const uuid_t *local_uuid, const uuid_t *remote_uuid,
663 u8 link, u8 depth)
664 {
665 struct tb_xdomain *xd;
666
667 pm_runtime_get_sync(&sw->dev);
668
669 xd = tb_xdomain_alloc(sw->tb, &sw->dev, route, local_uuid, remote_uuid);
670 if (!xd)
671 goto out;
672
673 xd->link = link;
674 xd->depth = depth;
675
676 tb_port_at(route, sw)->xdomain = xd;
677
678 tb_xdomain_add(xd);
679
680 out:
681 pm_runtime_mark_last_busy(&sw->dev);
682 pm_runtime_put_autosuspend(&sw->dev);
683 }
684
685 static void update_xdomain(struct tb_xdomain *xd, u64 route, u8 link)
686 {
687 xd->link = link;
688 xd->route = route;
689 xd->is_unplugged = false;
690 }
691
692 static void remove_xdomain(struct tb_xdomain *xd)
693 {
694 struct tb_switch *sw;
695
696 sw = tb_to_switch(xd->dev.parent);
697 tb_port_at(xd->route, sw)->xdomain = NULL;
698 tb_xdomain_remove(xd);
699 }
700
701 static void
702 icm_fr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr)
703 {
704 const struct icm_fr_event_device_connected *pkg =
705 (const struct icm_fr_event_device_connected *)hdr;
706 enum tb_security_level security_level;
707 struct tb_switch *sw, *parent_sw;
708 bool boot, dual_lane, speed_gen3;
709 struct icm *icm = tb_priv(tb);
710 bool authorized = false;
711 struct tb_xdomain *xd;
712 u8 link, depth;
713 u64 route;
714 int ret;
715
716 icm_postpone_rescan(tb);
717
718 link = pkg->link_info & ICM_LINK_INFO_LINK_MASK;
719 depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
720 ICM_LINK_INFO_DEPTH_SHIFT;
721 authorized = pkg->link_info & ICM_LINK_INFO_APPROVED;
722 security_level = (pkg->hdr.flags & ICM_FLAGS_SLEVEL_MASK) >>
723 ICM_FLAGS_SLEVEL_SHIFT;
724 boot = pkg->link_info & ICM_LINK_INFO_BOOT;
725 dual_lane = pkg->hdr.flags & ICM_FLAGS_DUAL_LANE;
726 speed_gen3 = pkg->hdr.flags & ICM_FLAGS_SPEED_GEN3;
727
728 if (pkg->link_info & ICM_LINK_INFO_REJECTED) {
729 tb_info(tb, "switch at %u.%u was rejected by ICM firmware because topology limit exceeded\n",
730 link, depth);
731 return;
732 }
733
734 sw = tb_switch_find_by_uuid(tb, &pkg->ep_uuid);
735 if (sw) {
736 u8 phy_port, sw_phy_port;
737
738 parent_sw = tb_to_switch(sw->dev.parent);
739 sw_phy_port = tb_phy_port_from_link(sw->link);
740 phy_port = tb_phy_port_from_link(link);
741
742 /*
743 * On resume ICM will send us connected events for the
744 * devices that still are present. However, that
745 * information might have changed for example by the
746 * fact that a switch on a dual-link connection might
747 * have been enumerated using the other link now. Make
748 * sure our book keeping matches that.
749 */
750 if (sw->depth == depth && sw_phy_port == phy_port &&
751 !!sw->authorized == authorized) {
752 /*
753 * It was enumerated through another link so update
754 * route string accordingly.
755 */
756 if (sw->link != link) {
757 ret = icm->get_route(tb, link, depth, &route);
758 if (ret) {
759 tb_err(tb, "failed to update route string for switch at %u.%u\n",
760 link, depth);
761 tb_switch_put(sw);
762 return;
763 }
764 } else {
765 route = tb_route(sw);
766 }
767
768 update_switch(parent_sw, sw, route, pkg->connection_id,
769 pkg->connection_key, link, depth, boot);
770 tb_switch_put(sw);
771 return;
772 }
773
774 /*
775 * User connected the same switch to another physical
776 * port or to another part of the topology. Remove the
777 * existing switch now before adding the new one.
778 */
779 remove_switch(sw);
780 tb_switch_put(sw);
781 }
782
783 /*
784 * If the switch was not found by UUID, look for a switch on
785 * same physical port (taking possible link aggregation into
786 * account) and depth. If we found one it is definitely a stale
787 * one so remove it first.
788 */
789 sw = tb_switch_find_by_link_depth(tb, link, depth);
790 if (!sw) {
791 u8 dual_link;
792
793 dual_link = dual_link_from_link(link);
794 if (dual_link)
795 sw = tb_switch_find_by_link_depth(tb, dual_link, depth);
796 }
797 if (sw) {
798 remove_switch(sw);
799 tb_switch_put(sw);
800 }
801
802 /* Remove existing XDomain connection if found */
803 xd = tb_xdomain_find_by_link_depth(tb, link, depth);
804 if (xd) {
805 remove_xdomain(xd);
806 tb_xdomain_put(xd);
807 }
808
809 parent_sw = tb_switch_find_by_link_depth(tb, link, depth - 1);
810 if (!parent_sw) {
811 tb_err(tb, "failed to find parent switch for %u.%u\n",
812 link, depth);
813 return;
814 }
815
816 ret = icm->get_route(tb, link, depth, &route);
817 if (ret) {
818 tb_err(tb, "failed to find route string for switch at %u.%u\n",
819 link, depth);
820 tb_switch_put(parent_sw);
821 return;
822 }
823
824 pm_runtime_get_sync(&parent_sw->dev);
825
826 sw = alloc_switch(parent_sw, route, &pkg->ep_uuid);
827 if (!IS_ERR(sw)) {
828 sw->connection_id = pkg->connection_id;
829 sw->connection_key = pkg->connection_key;
830 sw->link = link;
831 sw->depth = depth;
832 sw->authorized = authorized;
833 sw->security_level = security_level;
834 sw->boot = boot;
835 sw->link_speed = speed_gen3 ? 20 : 10;
836 sw->link_width = dual_lane ? 2 : 1;
837 sw->rpm = intel_vss_is_rtd3(pkg->ep_name, sizeof(pkg->ep_name));
838
839 if (add_switch(parent_sw, sw))
840 tb_switch_put(sw);
841 }
842
843 pm_runtime_mark_last_busy(&parent_sw->dev);
844 pm_runtime_put_autosuspend(&parent_sw->dev);
845
846 tb_switch_put(parent_sw);
847 }
848
849 static void
850 icm_fr_device_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
851 {
852 const struct icm_fr_event_device_disconnected *pkg =
853 (const struct icm_fr_event_device_disconnected *)hdr;
854 struct tb_switch *sw;
855 u8 link, depth;
856
857 link = pkg->link_info & ICM_LINK_INFO_LINK_MASK;
858 depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
859 ICM_LINK_INFO_DEPTH_SHIFT;
860
861 if (link > ICM_MAX_LINK || depth > TB_SWITCH_MAX_DEPTH) {
862 tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth);
863 return;
864 }
865
866 sw = tb_switch_find_by_link_depth(tb, link, depth);
867 if (!sw) {
868 tb_warn(tb, "no switch exists at %u.%u, ignoring\n", link,
869 depth);
870 return;
871 }
872
873 remove_switch(sw);
874 tb_switch_put(sw);
875 }
876
877 static void
878 icm_fr_xdomain_connected(struct tb *tb, const struct icm_pkg_header *hdr)
879 {
880 const struct icm_fr_event_xdomain_connected *pkg =
881 (const struct icm_fr_event_xdomain_connected *)hdr;
882 struct tb_xdomain *xd;
883 struct tb_switch *sw;
884 u8 link, depth;
885 u64 route;
886
887 link = pkg->link_info & ICM_LINK_INFO_LINK_MASK;
888 depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
889 ICM_LINK_INFO_DEPTH_SHIFT;
890
891 if (link > ICM_MAX_LINK || depth > TB_SWITCH_MAX_DEPTH) {
892 tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth);
893 return;
894 }
895
896 route = get_route(pkg->local_route_hi, pkg->local_route_lo);
897
898 xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid);
899 if (xd) {
900 u8 xd_phy_port, phy_port;
901
902 xd_phy_port = phy_port_from_route(xd->route, xd->depth);
903 phy_port = phy_port_from_route(route, depth);
904
905 if (xd->depth == depth && xd_phy_port == phy_port) {
906 update_xdomain(xd, route, link);
907 tb_xdomain_put(xd);
908 return;
909 }
910
911 /*
912 * If we find an existing XDomain connection remove it
913 * now. We need to go through login handshake and
914 * everything anyway to be able to re-establish the
915 * connection.
916 */
917 remove_xdomain(xd);
918 tb_xdomain_put(xd);
919 }
920
921 /*
922 * Look if there already exists an XDomain in the same place
923 * than the new one and in that case remove it because it is
924 * most likely another host that got disconnected.
925 */
926 xd = tb_xdomain_find_by_link_depth(tb, link, depth);
927 if (!xd) {
928 u8 dual_link;
929
930 dual_link = dual_link_from_link(link);
931 if (dual_link)
932 xd = tb_xdomain_find_by_link_depth(tb, dual_link,
933 depth);
934 }
935 if (xd) {
936 remove_xdomain(xd);
937 tb_xdomain_put(xd);
938 }
939
940 /*
941 * If the user disconnected a switch during suspend and
942 * connected another host to the same port, remove the switch
943 * first.
944 */
945 sw = tb_switch_find_by_route(tb, route);
946 if (sw) {
947 remove_switch(sw);
948 tb_switch_put(sw);
949 }
950
951 sw = tb_switch_find_by_link_depth(tb, link, depth);
952 if (!sw) {
953 tb_warn(tb, "no switch exists at %u.%u, ignoring\n", link,
954 depth);
955 return;
956 }
957
958 add_xdomain(sw, route, &pkg->local_uuid, &pkg->remote_uuid, link,
959 depth);
960 tb_switch_put(sw);
961 }
962
963 static void
964 icm_fr_xdomain_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
965 {
966 const struct icm_fr_event_xdomain_disconnected *pkg =
967 (const struct icm_fr_event_xdomain_disconnected *)hdr;
968 struct tb_xdomain *xd;
969
970 /*
971 * If the connection is through one or multiple devices, the
972 * XDomain device is removed along with them so it is fine if we
973 * cannot find it here.
974 */
975 xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid);
976 if (xd) {
977 remove_xdomain(xd);
978 tb_xdomain_put(xd);
979 }
980 }
981
982 static int icm_tr_cio_reset(struct tb *tb)
983 {
984 return pcie2cio_write(tb_priv(tb), TB_CFG_SWITCH, 0, 0x777, BIT(1));
985 }
986
987 static int
988 icm_tr_driver_ready(struct tb *tb, enum tb_security_level *security_level,
989 size_t *nboot_acl, bool *rpm)
990 {
991 struct icm_tr_pkg_driver_ready_response reply;
992 struct icm_pkg_driver_ready request = {
993 .hdr.code = ICM_DRIVER_READY,
994 };
995 int ret;
996
997 memset(&reply, 0, sizeof(reply));
998 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
999 1, 20000);
1000 if (ret)
1001 return ret;
1002
1003 if (security_level)
1004 *security_level = reply.info & ICM_TR_INFO_SLEVEL_MASK;
1005 if (nboot_acl)
1006 *nboot_acl = (reply.info & ICM_TR_INFO_BOOT_ACL_MASK) >>
1007 ICM_TR_INFO_BOOT_ACL_SHIFT;
1008 if (rpm)
1009 *rpm = !!(reply.hdr.flags & ICM_TR_FLAGS_RTD3);
1010
1011 return 0;
1012 }
1013
1014 static int icm_tr_approve_switch(struct tb *tb, struct tb_switch *sw)
1015 {
1016 struct icm_tr_pkg_approve_device request;
1017 struct icm_tr_pkg_approve_device reply;
1018 int ret;
1019
1020 memset(&request, 0, sizeof(request));
1021 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
1022 request.hdr.code = ICM_APPROVE_DEVICE;
1023 request.route_lo = sw->config.route_lo;
1024 request.route_hi = sw->config.route_hi;
1025 request.connection_id = sw->connection_id;
1026
1027 memset(&reply, 0, sizeof(reply));
1028 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1029 1, ICM_APPROVE_TIMEOUT);
1030 if (ret)
1031 return ret;
1032
1033 if (reply.hdr.flags & ICM_FLAGS_ERROR) {
1034 tb_warn(tb, "PCIe tunnel creation failed\n");
1035 return -EIO;
1036 }
1037
1038 return 0;
1039 }
1040
1041 static int icm_tr_add_switch_key(struct tb *tb, struct tb_switch *sw)
1042 {
1043 struct icm_tr_pkg_add_device_key_response reply;
1044 struct icm_tr_pkg_add_device_key request;
1045 int ret;
1046
1047 memset(&request, 0, sizeof(request));
1048 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
1049 request.hdr.code = ICM_ADD_DEVICE_KEY;
1050 request.route_lo = sw->config.route_lo;
1051 request.route_hi = sw->config.route_hi;
1052 request.connection_id = sw->connection_id;
1053 memcpy(request.key, sw->key, TB_SWITCH_KEY_SIZE);
1054
1055 memset(&reply, 0, sizeof(reply));
1056 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1057 1, ICM_TIMEOUT);
1058 if (ret)
1059 return ret;
1060
1061 if (reply.hdr.flags & ICM_FLAGS_ERROR) {
1062 tb_warn(tb, "Adding key to switch failed\n");
1063 return -EIO;
1064 }
1065
1066 return 0;
1067 }
1068
1069 static int icm_tr_challenge_switch_key(struct tb *tb, struct tb_switch *sw,
1070 const u8 *challenge, u8 *response)
1071 {
1072 struct icm_tr_pkg_challenge_device_response reply;
1073 struct icm_tr_pkg_challenge_device request;
1074 int ret;
1075
1076 memset(&request, 0, sizeof(request));
1077 memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid));
1078 request.hdr.code = ICM_CHALLENGE_DEVICE;
1079 request.route_lo = sw->config.route_lo;
1080 request.route_hi = sw->config.route_hi;
1081 request.connection_id = sw->connection_id;
1082 memcpy(request.challenge, challenge, TB_SWITCH_KEY_SIZE);
1083
1084 memset(&reply, 0, sizeof(reply));
1085 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1086 1, ICM_TIMEOUT);
1087 if (ret)
1088 return ret;
1089
1090 if (reply.hdr.flags & ICM_FLAGS_ERROR)
1091 return -EKEYREJECTED;
1092 if (reply.hdr.flags & ICM_FLAGS_NO_KEY)
1093 return -ENOKEY;
1094
1095 memcpy(response, reply.response, TB_SWITCH_KEY_SIZE);
1096
1097 return 0;
1098 }
1099
1100 static int icm_tr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
1101 {
1102 struct icm_tr_pkg_approve_xdomain_response reply;
1103 struct icm_tr_pkg_approve_xdomain request;
1104 int ret;
1105
1106 memset(&request, 0, sizeof(request));
1107 request.hdr.code = ICM_APPROVE_XDOMAIN;
1108 request.route_hi = upper_32_bits(xd->route);
1109 request.route_lo = lower_32_bits(xd->route);
1110 request.transmit_path = xd->transmit_path;
1111 request.transmit_ring = xd->transmit_ring;
1112 request.receive_path = xd->receive_path;
1113 request.receive_ring = xd->receive_ring;
1114 memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid));
1115
1116 memset(&reply, 0, sizeof(reply));
1117 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1118 1, ICM_TIMEOUT);
1119 if (ret)
1120 return ret;
1121
1122 if (reply.hdr.flags & ICM_FLAGS_ERROR)
1123 return -EIO;
1124
1125 return 0;
1126 }
1127
1128 static int icm_tr_xdomain_tear_down(struct tb *tb, struct tb_xdomain *xd,
1129 int stage)
1130 {
1131 struct icm_tr_pkg_disconnect_xdomain_response reply;
1132 struct icm_tr_pkg_disconnect_xdomain request;
1133 int ret;
1134
1135 memset(&request, 0, sizeof(request));
1136 request.hdr.code = ICM_DISCONNECT_XDOMAIN;
1137 request.stage = stage;
1138 request.route_hi = upper_32_bits(xd->route);
1139 request.route_lo = lower_32_bits(xd->route);
1140 memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid));
1141
1142 memset(&reply, 0, sizeof(reply));
1143 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1144 1, ICM_TIMEOUT);
1145 if (ret)
1146 return ret;
1147
1148 if (reply.hdr.flags & ICM_FLAGS_ERROR)
1149 return -EIO;
1150
1151 return 0;
1152 }
1153
1154 static int icm_tr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
1155 {
1156 int ret;
1157
1158 ret = icm_tr_xdomain_tear_down(tb, xd, 1);
1159 if (ret)
1160 return ret;
1161
1162 usleep_range(10, 50);
1163 return icm_tr_xdomain_tear_down(tb, xd, 2);
1164 }
1165
1166 static void
1167 __icm_tr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr,
1168 bool force_rtd3)
1169 {
1170 const struct icm_tr_event_device_connected *pkg =
1171 (const struct icm_tr_event_device_connected *)hdr;
1172 bool authorized, boot, dual_lane, speed_gen3;
1173 enum tb_security_level security_level;
1174 struct tb_switch *sw, *parent_sw;
1175 struct tb_xdomain *xd;
1176 u64 route;
1177
1178 icm_postpone_rescan(tb);
1179
1180 /*
1181 * Currently we don't use the QoS information coming with the
1182 * device connected message so simply just ignore that extra
1183 * packet for now.
1184 */
1185 if (pkg->hdr.packet_id)
1186 return;
1187
1188 route = get_route(pkg->route_hi, pkg->route_lo);
1189 authorized = pkg->link_info & ICM_LINK_INFO_APPROVED;
1190 security_level = (pkg->hdr.flags & ICM_FLAGS_SLEVEL_MASK) >>
1191 ICM_FLAGS_SLEVEL_SHIFT;
1192 boot = pkg->link_info & ICM_LINK_INFO_BOOT;
1193 dual_lane = pkg->hdr.flags & ICM_FLAGS_DUAL_LANE;
1194 speed_gen3 = pkg->hdr.flags & ICM_FLAGS_SPEED_GEN3;
1195
1196 if (pkg->link_info & ICM_LINK_INFO_REJECTED) {
1197 tb_info(tb, "switch at %llx was rejected by ICM firmware because topology limit exceeded\n",
1198 route);
1199 return;
1200 }
1201
1202 sw = tb_switch_find_by_uuid(tb, &pkg->ep_uuid);
1203 if (sw) {
1204 /* Update the switch if it is still in the same place */
1205 if (tb_route(sw) == route && !!sw->authorized == authorized) {
1206 parent_sw = tb_to_switch(sw->dev.parent);
1207 update_switch(parent_sw, sw, route, pkg->connection_id,
1208 0, 0, 0, boot);
1209 tb_switch_put(sw);
1210 return;
1211 }
1212
1213 remove_switch(sw);
1214 tb_switch_put(sw);
1215 }
1216
1217 /* Another switch with the same address */
1218 sw = tb_switch_find_by_route(tb, route);
1219 if (sw) {
1220 remove_switch(sw);
1221 tb_switch_put(sw);
1222 }
1223
1224 /* XDomain connection with the same address */
1225 xd = tb_xdomain_find_by_route(tb, route);
1226 if (xd) {
1227 remove_xdomain(xd);
1228 tb_xdomain_put(xd);
1229 }
1230
1231 parent_sw = tb_switch_find_by_route(tb, get_parent_route(route));
1232 if (!parent_sw) {
1233 tb_err(tb, "failed to find parent switch for %llx\n", route);
1234 return;
1235 }
1236
1237 pm_runtime_get_sync(&parent_sw->dev);
1238
1239 sw = alloc_switch(parent_sw, route, &pkg->ep_uuid);
1240 if (!IS_ERR(sw)) {
1241 sw->connection_id = pkg->connection_id;
1242 sw->authorized = authorized;
1243 sw->security_level = security_level;
1244 sw->boot = boot;
1245 sw->link_speed = speed_gen3 ? 20 : 10;
1246 sw->link_width = dual_lane ? 2 : 1;
1247 sw->rpm = force_rtd3;
1248 if (!sw->rpm)
1249 sw->rpm = intel_vss_is_rtd3(pkg->ep_name,
1250 sizeof(pkg->ep_name));
1251
1252 if (add_switch(parent_sw, sw))
1253 tb_switch_put(sw);
1254 }
1255
1256 pm_runtime_mark_last_busy(&parent_sw->dev);
1257 pm_runtime_put_autosuspend(&parent_sw->dev);
1258
1259 tb_switch_put(parent_sw);
1260 }
1261
1262 static void
1263 icm_tr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr)
1264 {
1265 __icm_tr_device_connected(tb, hdr, false);
1266 }
1267
1268 static void
1269 icm_tr_device_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
1270 {
1271 const struct icm_tr_event_device_disconnected *pkg =
1272 (const struct icm_tr_event_device_disconnected *)hdr;
1273 struct tb_switch *sw;
1274 u64 route;
1275
1276 route = get_route(pkg->route_hi, pkg->route_lo);
1277
1278 sw = tb_switch_find_by_route(tb, route);
1279 if (!sw) {
1280 tb_warn(tb, "no switch exists at %llx, ignoring\n", route);
1281 return;
1282 }
1283
1284 remove_switch(sw);
1285 tb_switch_put(sw);
1286 }
1287
1288 static void
1289 icm_tr_xdomain_connected(struct tb *tb, const struct icm_pkg_header *hdr)
1290 {
1291 const struct icm_tr_event_xdomain_connected *pkg =
1292 (const struct icm_tr_event_xdomain_connected *)hdr;
1293 struct tb_xdomain *xd;
1294 struct tb_switch *sw;
1295 u64 route;
1296
1297 if (!tb->root_switch)
1298 return;
1299
1300 route = get_route(pkg->local_route_hi, pkg->local_route_lo);
1301
1302 xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid);
1303 if (xd) {
1304 if (xd->route == route) {
1305 update_xdomain(xd, route, 0);
1306 tb_xdomain_put(xd);
1307 return;
1308 }
1309
1310 remove_xdomain(xd);
1311 tb_xdomain_put(xd);
1312 }
1313
1314 /* An existing xdomain with the same address */
1315 xd = tb_xdomain_find_by_route(tb, route);
1316 if (xd) {
1317 remove_xdomain(xd);
1318 tb_xdomain_put(xd);
1319 }
1320
1321 /*
1322 * If the user disconnected a switch during suspend and
1323 * connected another host to the same port, remove the switch
1324 * first.
1325 */
1326 sw = tb_switch_find_by_route(tb, route);
1327 if (sw) {
1328 remove_switch(sw);
1329 tb_switch_put(sw);
1330 }
1331
1332 sw = tb_switch_find_by_route(tb, get_parent_route(route));
1333 if (!sw) {
1334 tb_warn(tb, "no switch exists at %llx, ignoring\n", route);
1335 return;
1336 }
1337
1338 add_xdomain(sw, route, &pkg->local_uuid, &pkg->remote_uuid, 0, 0);
1339 tb_switch_put(sw);
1340 }
1341
1342 static void
1343 icm_tr_xdomain_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
1344 {
1345 const struct icm_tr_event_xdomain_disconnected *pkg =
1346 (const struct icm_tr_event_xdomain_disconnected *)hdr;
1347 struct tb_xdomain *xd;
1348 u64 route;
1349
1350 route = get_route(pkg->route_hi, pkg->route_lo);
1351
1352 xd = tb_xdomain_find_by_route(tb, route);
1353 if (xd) {
1354 remove_xdomain(xd);
1355 tb_xdomain_put(xd);
1356 }
1357 }
1358
1359 static struct pci_dev *get_upstream_port(struct pci_dev *pdev)
1360 {
1361 struct pci_dev *parent;
1362
1363 parent = pci_upstream_bridge(pdev);
1364 while (parent) {
1365 if (!pci_is_pcie(parent))
1366 return NULL;
1367 if (pci_pcie_type(parent) == PCI_EXP_TYPE_UPSTREAM)
1368 break;
1369 parent = pci_upstream_bridge(parent);
1370 }
1371
1372 if (!parent)
1373 return NULL;
1374
1375 switch (parent->device) {
1376 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
1377 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE:
1378 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
1379 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
1380 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
1381 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_BRIDGE:
1382 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_BRIDGE:
1383 return parent;
1384 }
1385
1386 return NULL;
1387 }
1388
1389 static bool icm_ar_is_supported(struct tb *tb)
1390 {
1391 struct pci_dev *upstream_port;
1392 struct icm *icm = tb_priv(tb);
1393
1394 /*
1395 * Starting from Alpine Ridge we can use ICM on Apple machines
1396 * as well. We just need to reset and re-enable it first.
1397 * However, only start it if explicitly asked by the user.
1398 */
1399 if (icm_firmware_running(tb->nhi))
1400 return true;
1401 if (!start_icm)
1402 return false;
1403
1404 /*
1405 * Find the upstream PCIe port in case we need to do reset
1406 * through its vendor specific registers.
1407 */
1408 upstream_port = get_upstream_port(tb->nhi->pdev);
1409 if (upstream_port) {
1410 int cap;
1411
1412 cap = pci_find_ext_capability(upstream_port,
1413 PCI_EXT_CAP_ID_VNDR);
1414 if (cap > 0) {
1415 icm->upstream_port = upstream_port;
1416 icm->vnd_cap = cap;
1417
1418 return true;
1419 }
1420 }
1421
1422 return false;
1423 }
1424
1425 static int icm_ar_cio_reset(struct tb *tb)
1426 {
1427 return pcie2cio_write(tb_priv(tb), TB_CFG_SWITCH, 0, 0x50, BIT(9));
1428 }
1429
1430 static int icm_ar_get_mode(struct tb *tb)
1431 {
1432 struct tb_nhi *nhi = tb->nhi;
1433 int retries = 60;
1434 u32 val;
1435
1436 do {
1437 val = ioread32(nhi->iobase + REG_FW_STS);
1438 if (val & REG_FW_STS_NVM_AUTH_DONE)
1439 break;
1440 msleep(50);
1441 } while (--retries);
1442
1443 if (!retries) {
1444 dev_err(&nhi->pdev->dev, "ICM firmware not authenticated\n");
1445 return -ENODEV;
1446 }
1447
1448 return nhi_mailbox_mode(nhi);
1449 }
1450
1451 static int
1452 icm_ar_driver_ready(struct tb *tb, enum tb_security_level *security_level,
1453 size_t *nboot_acl, bool *rpm)
1454 {
1455 struct icm_ar_pkg_driver_ready_response reply;
1456 struct icm_pkg_driver_ready request = {
1457 .hdr.code = ICM_DRIVER_READY,
1458 };
1459 int ret;
1460
1461 memset(&reply, 0, sizeof(reply));
1462 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1463 1, ICM_TIMEOUT);
1464 if (ret)
1465 return ret;
1466
1467 if (security_level)
1468 *security_level = reply.info & ICM_AR_INFO_SLEVEL_MASK;
1469 if (nboot_acl && (reply.info & ICM_AR_INFO_BOOT_ACL_SUPPORTED))
1470 *nboot_acl = (reply.info & ICM_AR_INFO_BOOT_ACL_MASK) >>
1471 ICM_AR_INFO_BOOT_ACL_SHIFT;
1472 if (rpm)
1473 *rpm = !!(reply.hdr.flags & ICM_AR_FLAGS_RTD3);
1474
1475 return 0;
1476 }
1477
1478 static int icm_ar_get_route(struct tb *tb, u8 link, u8 depth, u64 *route)
1479 {
1480 struct icm_ar_pkg_get_route_response reply;
1481 struct icm_ar_pkg_get_route request = {
1482 .hdr = { .code = ICM_GET_ROUTE },
1483 .link_info = depth << ICM_LINK_INFO_DEPTH_SHIFT | link,
1484 };
1485 int ret;
1486
1487 memset(&reply, 0, sizeof(reply));
1488 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1489 1, ICM_TIMEOUT);
1490 if (ret)
1491 return ret;
1492
1493 if (reply.hdr.flags & ICM_FLAGS_ERROR)
1494 return -EIO;
1495
1496 *route = get_route(reply.route_hi, reply.route_lo);
1497 return 0;
1498 }
1499
1500 static int icm_ar_get_boot_acl(struct tb *tb, uuid_t *uuids, size_t nuuids)
1501 {
1502 struct icm_ar_pkg_preboot_acl_response reply;
1503 struct icm_ar_pkg_preboot_acl request = {
1504 .hdr = { .code = ICM_PREBOOT_ACL },
1505 };
1506 int ret, i;
1507
1508 memset(&reply, 0, sizeof(reply));
1509 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1510 1, ICM_TIMEOUT);
1511 if (ret)
1512 return ret;
1513
1514 if (reply.hdr.flags & ICM_FLAGS_ERROR)
1515 return -EIO;
1516
1517 for (i = 0; i < nuuids; i++) {
1518 u32 *uuid = (u32 *)&uuids[i];
1519
1520 uuid[0] = reply.acl[i].uuid_lo;
1521 uuid[1] = reply.acl[i].uuid_hi;
1522
1523 if (uuid[0] == 0xffffffff && uuid[1] == 0xffffffff) {
1524 /* Map empty entries to null UUID */
1525 uuid[0] = 0;
1526 uuid[1] = 0;
1527 } else if (uuid[0] != 0 || uuid[1] != 0) {
1528 /* Upper two DWs are always one's */
1529 uuid[2] = 0xffffffff;
1530 uuid[3] = 0xffffffff;
1531 }
1532 }
1533
1534 return ret;
1535 }
1536
1537 static int icm_ar_set_boot_acl(struct tb *tb, const uuid_t *uuids,
1538 size_t nuuids)
1539 {
1540 struct icm_ar_pkg_preboot_acl_response reply;
1541 struct icm_ar_pkg_preboot_acl request = {
1542 .hdr = {
1543 .code = ICM_PREBOOT_ACL,
1544 .flags = ICM_FLAGS_WRITE,
1545 },
1546 };
1547 int ret, i;
1548
1549 for (i = 0; i < nuuids; i++) {
1550 const u32 *uuid = (const u32 *)&uuids[i];
1551
1552 if (uuid_is_null(&uuids[i])) {
1553 /*
1554 * Map null UUID to the empty (all one) entries
1555 * for ICM.
1556 */
1557 request.acl[i].uuid_lo = 0xffffffff;
1558 request.acl[i].uuid_hi = 0xffffffff;
1559 } else {
1560 /* Two high DWs need to be set to all one */
1561 if (uuid[2] != 0xffffffff || uuid[3] != 0xffffffff)
1562 return -EINVAL;
1563
1564 request.acl[i].uuid_lo = uuid[0];
1565 request.acl[i].uuid_hi = uuid[1];
1566 }
1567 }
1568
1569 memset(&reply, 0, sizeof(reply));
1570 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1571 1, ICM_TIMEOUT);
1572 if (ret)
1573 return ret;
1574
1575 if (reply.hdr.flags & ICM_FLAGS_ERROR)
1576 return -EIO;
1577
1578 return 0;
1579 }
1580
1581 static int
1582 icm_icl_driver_ready(struct tb *tb, enum tb_security_level *security_level,
1583 size_t *nboot_acl, bool *rpm)
1584 {
1585 struct icm_tr_pkg_driver_ready_response reply;
1586 struct icm_pkg_driver_ready request = {
1587 .hdr.code = ICM_DRIVER_READY,
1588 };
1589 int ret;
1590
1591 memset(&reply, 0, sizeof(reply));
1592 ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
1593 1, 20000);
1594 if (ret)
1595 return ret;
1596
1597 /* Ice Lake always supports RTD3 */
1598 if (rpm)
1599 *rpm = true;
1600
1601 return 0;
1602 }
1603
1604 static void icm_icl_set_uuid(struct tb *tb)
1605 {
1606 struct tb_nhi *nhi = tb->nhi;
1607 u32 uuid[4];
1608
1609 pci_read_config_dword(nhi->pdev, VS_CAP_10, &uuid[0]);
1610 pci_read_config_dword(nhi->pdev, VS_CAP_11, &uuid[1]);
1611 uuid[2] = 0xffffffff;
1612 uuid[3] = 0xffffffff;
1613
1614 tb->root_switch->uuid = kmemdup(uuid, sizeof(uuid), GFP_KERNEL);
1615 }
1616
1617 static void
1618 icm_icl_device_connected(struct tb *tb, const struct icm_pkg_header *hdr)
1619 {
1620 __icm_tr_device_connected(tb, hdr, true);
1621 }
1622
1623 static void icm_icl_rtd3_veto(struct tb *tb, const struct icm_pkg_header *hdr)
1624 {
1625 const struct icm_icl_event_rtd3_veto *pkg =
1626 (const struct icm_icl_event_rtd3_veto *)hdr;
1627
1628 tb_dbg(tb, "ICM rtd3 veto=0x%08x\n", pkg->veto_reason);
1629
1630 if (pkg->veto_reason)
1631 icm_veto_begin(tb);
1632 else
1633 icm_veto_end(tb);
1634 }
1635
1636 static void icm_handle_notification(struct work_struct *work)
1637 {
1638 struct icm_notification *n = container_of(work, typeof(*n), work);
1639 struct tb *tb = n->tb;
1640 struct icm *icm = tb_priv(tb);
1641
1642 mutex_lock(&tb->lock);
1643
1644 /*
1645 * When the domain is stopped we flush its workqueue but before
1646 * that the root switch is removed. In that case we should treat
1647 * the queued events as being canceled.
1648 */
1649 if (tb->root_switch) {
1650 switch (n->pkg->code) {
1651 case ICM_EVENT_DEVICE_CONNECTED:
1652 icm->device_connected(tb, n->pkg);
1653 break;
1654 case ICM_EVENT_DEVICE_DISCONNECTED:
1655 icm->device_disconnected(tb, n->pkg);
1656 break;
1657 case ICM_EVENT_XDOMAIN_CONNECTED:
1658 icm->xdomain_connected(tb, n->pkg);
1659 break;
1660 case ICM_EVENT_XDOMAIN_DISCONNECTED:
1661 icm->xdomain_disconnected(tb, n->pkg);
1662 break;
1663 case ICM_EVENT_RTD3_VETO:
1664 icm->rtd3_veto(tb, n->pkg);
1665 break;
1666 }
1667 }
1668
1669 mutex_unlock(&tb->lock);
1670
1671 kfree(n->pkg);
1672 kfree(n);
1673 }
1674
1675 static void icm_handle_event(struct tb *tb, enum tb_cfg_pkg_type type,
1676 const void *buf, size_t size)
1677 {
1678 struct icm_notification *n;
1679
1680 n = kmalloc(sizeof(*n), GFP_KERNEL);
1681 if (!n)
1682 return;
1683
1684 INIT_WORK(&n->work, icm_handle_notification);
1685 n->pkg = kmemdup(buf, size, GFP_KERNEL);
1686 n->tb = tb;
1687
1688 queue_work(tb->wq, &n->work);
1689 }
1690
1691 static int
1692 __icm_driver_ready(struct tb *tb, enum tb_security_level *security_level,
1693 size_t *nboot_acl, bool *rpm)
1694 {
1695 struct icm *icm = tb_priv(tb);
1696 unsigned int retries = 50;
1697 int ret;
1698
1699 ret = icm->driver_ready(tb, security_level, nboot_acl, rpm);
1700 if (ret) {
1701 tb_err(tb, "failed to send driver ready to ICM\n");
1702 return ret;
1703 }
1704
1705 /*
1706 * Hold on here until the switch config space is accessible so
1707 * that we can read root switch config successfully.
1708 */
1709 do {
1710 struct tb_cfg_result res;
1711 u32 tmp;
1712
1713 res = tb_cfg_read_raw(tb->ctl, &tmp, 0, 0, TB_CFG_SWITCH,
1714 0, 1, 100);
1715 if (!res.err)
1716 return 0;
1717
1718 msleep(50);
1719 } while (--retries);
1720
1721 tb_err(tb, "failed to read root switch config space, giving up\n");
1722 return -ETIMEDOUT;
1723 }
1724
1725 static int icm_firmware_reset(struct tb *tb, struct tb_nhi *nhi)
1726 {
1727 struct icm *icm = tb_priv(tb);
1728 u32 val;
1729
1730 if (!icm->upstream_port)
1731 return -ENODEV;
1732
1733 /* Put ARC to wait for CIO reset event to happen */
1734 val = ioread32(nhi->iobase + REG_FW_STS);
1735 val |= REG_FW_STS_CIO_RESET_REQ;
1736 iowrite32(val, nhi->iobase + REG_FW_STS);
1737
1738 /* Re-start ARC */
1739 val = ioread32(nhi->iobase + REG_FW_STS);
1740 val |= REG_FW_STS_ICM_EN_INVERT;
1741 val |= REG_FW_STS_ICM_EN_CPU;
1742 iowrite32(val, nhi->iobase + REG_FW_STS);
1743
1744 /* Trigger CIO reset now */
1745 return icm->cio_reset(tb);
1746 }
1747
1748 static int icm_firmware_start(struct tb *tb, struct tb_nhi *nhi)
1749 {
1750 unsigned int retries = 10;
1751 int ret;
1752 u32 val;
1753
1754 /* Check if the ICM firmware is already running */
1755 if (icm_firmware_running(nhi))
1756 return 0;
1757
1758 dev_dbg(&nhi->pdev->dev, "starting ICM firmware\n");
1759
1760 ret = icm_firmware_reset(tb, nhi);
1761 if (ret)
1762 return ret;
1763
1764 /* Wait until the ICM firmware tells us it is up and running */
1765 do {
1766 /* Check that the ICM firmware is running */
1767 val = ioread32(nhi->iobase + REG_FW_STS);
1768 if (val & REG_FW_STS_NVM_AUTH_DONE)
1769 return 0;
1770
1771 msleep(300);
1772 } while (--retries);
1773
1774 return -ETIMEDOUT;
1775 }
1776
1777 static int icm_reset_phy_port(struct tb *tb, int phy_port)
1778 {
1779 struct icm *icm = tb_priv(tb);
1780 u32 state0, state1;
1781 int port0, port1;
1782 u32 val0, val1;
1783 int ret;
1784
1785 if (!icm->upstream_port)
1786 return 0;
1787
1788 if (phy_port) {
1789 port0 = 3;
1790 port1 = 4;
1791 } else {
1792 port0 = 1;
1793 port1 = 2;
1794 }
1795
1796 /*
1797 * Read link status of both null ports belonging to a single
1798 * physical port.
1799 */
1800 ret = pcie2cio_read(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, &val0);
1801 if (ret)
1802 return ret;
1803 ret = pcie2cio_read(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, &val1);
1804 if (ret)
1805 return ret;
1806
1807 state0 = val0 & PHY_PORT_CS1_LINK_STATE_MASK;
1808 state0 >>= PHY_PORT_CS1_LINK_STATE_SHIFT;
1809 state1 = val1 & PHY_PORT_CS1_LINK_STATE_MASK;
1810 state1 >>= PHY_PORT_CS1_LINK_STATE_SHIFT;
1811
1812 /* If they are both up we need to reset them now */
1813 if (state0 != TB_PORT_UP || state1 != TB_PORT_UP)
1814 return 0;
1815
1816 val0 |= PHY_PORT_CS1_LINK_DISABLE;
1817 ret = pcie2cio_write(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, val0);
1818 if (ret)
1819 return ret;
1820
1821 val1 |= PHY_PORT_CS1_LINK_DISABLE;
1822 ret = pcie2cio_write(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, val1);
1823 if (ret)
1824 return ret;
1825
1826 /* Wait a bit and then re-enable both ports */
1827 usleep_range(10, 100);
1828
1829 ret = pcie2cio_read(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, &val0);
1830 if (ret)
1831 return ret;
1832 ret = pcie2cio_read(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, &val1);
1833 if (ret)
1834 return ret;
1835
1836 val0 &= ~PHY_PORT_CS1_LINK_DISABLE;
1837 ret = pcie2cio_write(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, val0);
1838 if (ret)
1839 return ret;
1840
1841 val1 &= ~PHY_PORT_CS1_LINK_DISABLE;
1842 return pcie2cio_write(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, val1);
1843 }
1844
1845 static int icm_firmware_init(struct tb *tb)
1846 {
1847 struct icm *icm = tb_priv(tb);
1848 struct tb_nhi *nhi = tb->nhi;
1849 int ret;
1850
1851 ret = icm_firmware_start(tb, nhi);
1852 if (ret) {
1853 dev_err(&nhi->pdev->dev, "could not start ICM firmware\n");
1854 return ret;
1855 }
1856
1857 if (icm->get_mode) {
1858 ret = icm->get_mode(tb);
1859
1860 switch (ret) {
1861 case NHI_FW_SAFE_MODE:
1862 icm->safe_mode = true;
1863 break;
1864
1865 case NHI_FW_CM_MODE:
1866 /* Ask ICM to accept all Thunderbolt devices */
1867 nhi_mailbox_cmd(nhi, NHI_MAILBOX_ALLOW_ALL_DEVS, 0);
1868 break;
1869
1870 default:
1871 if (ret < 0)
1872 return ret;
1873
1874 tb_err(tb, "ICM firmware is in wrong mode: %u\n", ret);
1875 return -ENODEV;
1876 }
1877 }
1878
1879 /*
1880 * Reset both physical ports if there is anything connected to
1881 * them already.
1882 */
1883 ret = icm_reset_phy_port(tb, 0);
1884 if (ret)
1885 dev_warn(&nhi->pdev->dev, "failed to reset links on port0\n");
1886 ret = icm_reset_phy_port(tb, 1);
1887 if (ret)
1888 dev_warn(&nhi->pdev->dev, "failed to reset links on port1\n");
1889
1890 return 0;
1891 }
1892
1893 static int icm_driver_ready(struct tb *tb)
1894 {
1895 struct icm *icm = tb_priv(tb);
1896 int ret;
1897
1898 ret = icm_firmware_init(tb);
1899 if (ret)
1900 return ret;
1901
1902 if (icm->safe_mode) {
1903 tb_info(tb, "Thunderbolt host controller is in safe mode.\n");
1904 tb_info(tb, "You need to update NVM firmware of the controller before it can be used.\n");
1905 tb_info(tb, "For latest updates check https://thunderbolttechnology.net/updates.\n");
1906 return 0;
1907 }
1908
1909 ret = __icm_driver_ready(tb, &tb->security_level, &tb->nboot_acl,
1910 &icm->rpm);
1911 if (ret)
1912 return ret;
1913
1914 /*
1915 * Make sure the number of supported preboot ACL matches what we
1916 * expect or disable the whole feature.
1917 */
1918 if (tb->nboot_acl > icm->max_boot_acl)
1919 tb->nboot_acl = 0;
1920
1921 return 0;
1922 }
1923
1924 static int icm_suspend(struct tb *tb)
1925 {
1926 struct icm *icm = tb_priv(tb);
1927
1928 if (icm->save_devices)
1929 icm->save_devices(tb);
1930
1931 nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0);
1932 return 0;
1933 }
1934
1935 /*
1936 * Mark all switches (except root switch) below this one unplugged. ICM
1937 * firmware will send us an updated list of switches after we have send
1938 * it driver ready command. If a switch is not in that list it will be
1939 * removed when we perform rescan.
1940 */
1941 static void icm_unplug_children(struct tb_switch *sw)
1942 {
1943 struct tb_port *port;
1944
1945 if (tb_route(sw))
1946 sw->is_unplugged = true;
1947
1948 tb_switch_for_each_port(sw, port) {
1949 if (port->xdomain)
1950 port->xdomain->is_unplugged = true;
1951 else if (tb_port_has_remote(port))
1952 icm_unplug_children(port->remote->sw);
1953 }
1954 }
1955
1956 static int complete_rpm(struct device *dev, void *data)
1957 {
1958 struct tb_switch *sw = tb_to_switch(dev);
1959
1960 if (sw)
1961 complete(&sw->rpm_complete);
1962 return 0;
1963 }
1964
1965 static void remove_unplugged_switch(struct tb_switch *sw)
1966 {
1967 pm_runtime_get_sync(sw->dev.parent);
1968
1969 /*
1970 * Signal this and switches below for rpm_complete because
1971 * tb_switch_remove() calls pm_runtime_get_sync() that then waits
1972 * for it.
1973 */
1974 complete_rpm(&sw->dev, NULL);
1975 bus_for_each_dev(&tb_bus_type, &sw->dev, NULL, complete_rpm);
1976 tb_switch_remove(sw);
1977
1978 pm_runtime_mark_last_busy(sw->dev.parent);
1979 pm_runtime_put_autosuspend(sw->dev.parent);
1980 }
1981
1982 static void icm_free_unplugged_children(struct tb_switch *sw)
1983 {
1984 struct tb_port *port;
1985
1986 tb_switch_for_each_port(sw, port) {
1987 if (port->xdomain && port->xdomain->is_unplugged) {
1988 tb_xdomain_remove(port->xdomain);
1989 port->xdomain = NULL;
1990 } else if (tb_port_has_remote(port)) {
1991 if (port->remote->sw->is_unplugged) {
1992 remove_unplugged_switch(port->remote->sw);
1993 port->remote = NULL;
1994 } else {
1995 icm_free_unplugged_children(port->remote->sw);
1996 }
1997 }
1998 }
1999 }
2000
2001 static void icm_rescan_work(struct work_struct *work)
2002 {
2003 struct icm *icm = container_of(work, struct icm, rescan_work.work);
2004 struct tb *tb = icm_to_tb(icm);
2005
2006 mutex_lock(&tb->lock);
2007 if (tb->root_switch)
2008 icm_free_unplugged_children(tb->root_switch);
2009 mutex_unlock(&tb->lock);
2010 }
2011
2012 static void icm_complete(struct tb *tb)
2013 {
2014 struct icm *icm = tb_priv(tb);
2015
2016 if (tb->nhi->going_away)
2017 return;
2018
2019 /*
2020 * If RTD3 was vetoed before we entered system suspend allow it
2021 * again now before driver ready is sent. Firmware sends a new RTD3
2022 * veto if it is still the case after we have sent it driver ready
2023 * command.
2024 */
2025 icm_veto_end(tb);
2026 icm_unplug_children(tb->root_switch);
2027
2028 /*
2029 * Now all existing children should be resumed, start events
2030 * from ICM to get updated status.
2031 */
2032 __icm_driver_ready(tb, NULL, NULL, NULL);
2033
2034 /*
2035 * We do not get notifications of devices that have been
2036 * unplugged during suspend so schedule rescan to clean them up
2037 * if any.
2038 */
2039 queue_delayed_work(tb->wq, &icm->rescan_work, msecs_to_jiffies(500));
2040 }
2041
2042 static int icm_runtime_suspend(struct tb *tb)
2043 {
2044 nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0);
2045 return 0;
2046 }
2047
2048 static int icm_runtime_suspend_switch(struct tb_switch *sw)
2049 {
2050 if (tb_route(sw))
2051 reinit_completion(&sw->rpm_complete);
2052 return 0;
2053 }
2054
2055 static int icm_runtime_resume_switch(struct tb_switch *sw)
2056 {
2057 if (tb_route(sw)) {
2058 if (!wait_for_completion_timeout(&sw->rpm_complete,
2059 msecs_to_jiffies(500))) {
2060 dev_dbg(&sw->dev, "runtime resuming timed out\n");
2061 }
2062 }
2063 return 0;
2064 }
2065
2066 static int icm_runtime_resume(struct tb *tb)
2067 {
2068 /*
2069 * We can reuse the same resume functionality than with system
2070 * suspend.
2071 */
2072 icm_complete(tb);
2073 return 0;
2074 }
2075
2076 static int icm_start(struct tb *tb)
2077 {
2078 struct icm *icm = tb_priv(tb);
2079 int ret;
2080
2081 if (icm->safe_mode)
2082 tb->root_switch = tb_switch_alloc_safe_mode(tb, &tb->dev, 0);
2083 else
2084 tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0);
2085 if (IS_ERR(tb->root_switch))
2086 return PTR_ERR(tb->root_switch);
2087
2088 tb->root_switch->no_nvm_upgrade = !icm->can_upgrade_nvm;
2089 tb->root_switch->rpm = icm->rpm;
2090
2091 if (icm->set_uuid)
2092 icm->set_uuid(tb);
2093
2094 ret = tb_switch_add(tb->root_switch);
2095 if (ret) {
2096 tb_switch_put(tb->root_switch);
2097 tb->root_switch = NULL;
2098 }
2099
2100 return ret;
2101 }
2102
2103 static void icm_stop(struct tb *tb)
2104 {
2105 struct icm *icm = tb_priv(tb);
2106
2107 cancel_delayed_work(&icm->rescan_work);
2108 tb_switch_remove(tb->root_switch);
2109 tb->root_switch = NULL;
2110 nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0);
2111 }
2112
2113 static int icm_disconnect_pcie_paths(struct tb *tb)
2114 {
2115 return nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DISCONNECT_PCIE_PATHS, 0);
2116 }
2117
2118 /* Falcon Ridge */
2119 static const struct tb_cm_ops icm_fr_ops = {
2120 .driver_ready = icm_driver_ready,
2121 .start = icm_start,
2122 .stop = icm_stop,
2123 .suspend = icm_suspend,
2124 .complete = icm_complete,
2125 .handle_event = icm_handle_event,
2126 .approve_switch = icm_fr_approve_switch,
2127 .add_switch_key = icm_fr_add_switch_key,
2128 .challenge_switch_key = icm_fr_challenge_switch_key,
2129 .disconnect_pcie_paths = icm_disconnect_pcie_paths,
2130 .approve_xdomain_paths = icm_fr_approve_xdomain_paths,
2131 .disconnect_xdomain_paths = icm_fr_disconnect_xdomain_paths,
2132 };
2133
2134 /* Alpine Ridge */
2135 static const struct tb_cm_ops icm_ar_ops = {
2136 .driver_ready = icm_driver_ready,
2137 .start = icm_start,
2138 .stop = icm_stop,
2139 .suspend = icm_suspend,
2140 .complete = icm_complete,
2141 .runtime_suspend = icm_runtime_suspend,
2142 .runtime_resume = icm_runtime_resume,
2143 .runtime_suspend_switch = icm_runtime_suspend_switch,
2144 .runtime_resume_switch = icm_runtime_resume_switch,
2145 .handle_event = icm_handle_event,
2146 .get_boot_acl = icm_ar_get_boot_acl,
2147 .set_boot_acl = icm_ar_set_boot_acl,
2148 .approve_switch = icm_fr_approve_switch,
2149 .add_switch_key = icm_fr_add_switch_key,
2150 .challenge_switch_key = icm_fr_challenge_switch_key,
2151 .disconnect_pcie_paths = icm_disconnect_pcie_paths,
2152 .approve_xdomain_paths = icm_fr_approve_xdomain_paths,
2153 .disconnect_xdomain_paths = icm_fr_disconnect_xdomain_paths,
2154 };
2155
2156 /* Titan Ridge */
2157 static const struct tb_cm_ops icm_tr_ops = {
2158 .driver_ready = icm_driver_ready,
2159 .start = icm_start,
2160 .stop = icm_stop,
2161 .suspend = icm_suspend,
2162 .complete = icm_complete,
2163 .runtime_suspend = icm_runtime_suspend,
2164 .runtime_resume = icm_runtime_resume,
2165 .runtime_suspend_switch = icm_runtime_suspend_switch,
2166 .runtime_resume_switch = icm_runtime_resume_switch,
2167 .handle_event = icm_handle_event,
2168 .get_boot_acl = icm_ar_get_boot_acl,
2169 .set_boot_acl = icm_ar_set_boot_acl,
2170 .approve_switch = icm_tr_approve_switch,
2171 .add_switch_key = icm_tr_add_switch_key,
2172 .challenge_switch_key = icm_tr_challenge_switch_key,
2173 .disconnect_pcie_paths = icm_disconnect_pcie_paths,
2174 .approve_xdomain_paths = icm_tr_approve_xdomain_paths,
2175 .disconnect_xdomain_paths = icm_tr_disconnect_xdomain_paths,
2176 };
2177
2178 /* Ice Lake */
2179 static const struct tb_cm_ops icm_icl_ops = {
2180 .driver_ready = icm_driver_ready,
2181 .start = icm_start,
2182 .stop = icm_stop,
2183 .complete = icm_complete,
2184 .runtime_suspend = icm_runtime_suspend,
2185 .runtime_resume = icm_runtime_resume,
2186 .handle_event = icm_handle_event,
2187 .approve_xdomain_paths = icm_tr_approve_xdomain_paths,
2188 .disconnect_xdomain_paths = icm_tr_disconnect_xdomain_paths,
2189 };
2190
2191 struct tb *icm_probe(struct tb_nhi *nhi)
2192 {
2193 struct icm *icm;
2194 struct tb *tb;
2195
2196 tb = tb_domain_alloc(nhi, sizeof(struct icm));
2197 if (!tb)
2198 return NULL;
2199
2200 icm = tb_priv(tb);
2201 INIT_DELAYED_WORK(&icm->rescan_work, icm_rescan_work);
2202 mutex_init(&icm->request_lock);
2203
2204 switch (nhi->pdev->device) {
2205 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI:
2206 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI:
2207 icm->can_upgrade_nvm = true;
2208 icm->is_supported = icm_fr_is_supported;
2209 icm->get_route = icm_fr_get_route;
2210 icm->save_devices = icm_fr_save_devices;
2211 icm->driver_ready = icm_fr_driver_ready;
2212 icm->device_connected = icm_fr_device_connected;
2213 icm->device_disconnected = icm_fr_device_disconnected;
2214 icm->xdomain_connected = icm_fr_xdomain_connected;
2215 icm->xdomain_disconnected = icm_fr_xdomain_disconnected;
2216 tb->cm_ops = &icm_fr_ops;
2217 break;
2218
2219 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_NHI:
2220 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_NHI:
2221 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_NHI:
2222 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_NHI:
2223 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_NHI:
2224 icm->max_boot_acl = ICM_AR_PREBOOT_ACL_ENTRIES;
2225 /*
2226 * NVM upgrade has not been tested on Apple systems and
2227 * they don't provide images publicly either. To be on
2228 * the safe side prevent root switch NVM upgrade on Macs
2229 * for now.
2230 */
2231 icm->can_upgrade_nvm = !x86_apple_machine;
2232 icm->is_supported = icm_ar_is_supported;
2233 icm->cio_reset = icm_ar_cio_reset;
2234 icm->get_mode = icm_ar_get_mode;
2235 icm->get_route = icm_ar_get_route;
2236 icm->save_devices = icm_fr_save_devices;
2237 icm->driver_ready = icm_ar_driver_ready;
2238 icm->device_connected = icm_fr_device_connected;
2239 icm->device_disconnected = icm_fr_device_disconnected;
2240 icm->xdomain_connected = icm_fr_xdomain_connected;
2241 icm->xdomain_disconnected = icm_fr_xdomain_disconnected;
2242 tb->cm_ops = &icm_ar_ops;
2243 break;
2244
2245 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_NHI:
2246 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_NHI:
2247 icm->max_boot_acl = ICM_AR_PREBOOT_ACL_ENTRIES;
2248 icm->can_upgrade_nvm = !x86_apple_machine;
2249 icm->is_supported = icm_ar_is_supported;
2250 icm->cio_reset = icm_tr_cio_reset;
2251 icm->get_mode = icm_ar_get_mode;
2252 icm->driver_ready = icm_tr_driver_ready;
2253 icm->device_connected = icm_tr_device_connected;
2254 icm->device_disconnected = icm_tr_device_disconnected;
2255 icm->xdomain_connected = icm_tr_xdomain_connected;
2256 icm->xdomain_disconnected = icm_tr_xdomain_disconnected;
2257 tb->cm_ops = &icm_tr_ops;
2258 break;
2259
2260 case PCI_DEVICE_ID_INTEL_ICL_NHI0:
2261 case PCI_DEVICE_ID_INTEL_ICL_NHI1:
2262 icm->is_supported = icm_fr_is_supported;
2263 icm->driver_ready = icm_icl_driver_ready;
2264 icm->set_uuid = icm_icl_set_uuid;
2265 icm->device_connected = icm_icl_device_connected;
2266 icm->device_disconnected = icm_tr_device_disconnected;
2267 icm->xdomain_connected = icm_tr_xdomain_connected;
2268 icm->xdomain_disconnected = icm_tr_xdomain_disconnected;
2269 icm->rtd3_veto = icm_icl_rtd3_veto;
2270 tb->cm_ops = &icm_icl_ops;
2271 break;
2272 }
2273
2274 if (!icm->is_supported || !icm->is_supported(tb)) {
2275 dev_dbg(&nhi->pdev->dev, "ICM not supported on this controller\n");
2276 tb_domain_put(tb);
2277 return NULL;
2278 }
2279
2280 return tb;
2281 }
connection oriented routing