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Merge tag 'x86-boot-2023-02-20' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-block.git] / net / bluetooth / msft.c
CommitLineData
145373cb
MC		 1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2020 Google Corporation
4 */
5
6#include <net/bluetooth/bluetooth.h>
7#include <net/bluetooth/hci_core.h>
a2a4dedf 8#include <net/bluetooth/mgmt.h>
145373cb 9
a2a4dedf
AP		 10#include "hci_request.h"
11#include "mgmt_util.h"
145373cb
MC		 12#include "msft.h"
13
a2a4dedf
AP		 14#define MSFT_RSSI_THRESHOLD_VALUE_MIN -127
15#define MSFT_RSSI_THRESHOLD_VALUE_MAX 20
16#define MSFT_RSSI_LOW_TIMEOUT_MAX 0x3C
17
145373cb
MC		 18#define MSFT_OP_READ_SUPPORTED_FEATURES 0x00
19struct msft_cp_read_supported_features {
20 __u8 sub_opcode;
21} __packed;
b08eadd2 22
145373cb
MC		 23struct msft_rp_read_supported_features {
24 __u8 status;
25 __u8 sub_opcode;
26 __le64 features;
27 __u8 evt_prefix_len;
b08eadd2 28 __u8 evt_prefix[];
145373cb
MC		 29} __packed;
30
a2a4dedf
AP		 31#define MSFT_OP_LE_MONITOR_ADVERTISEMENT 0x03
32#define MSFT_MONITOR_ADVERTISEMENT_TYPE_PATTERN 0x01
33struct msft_le_monitor_advertisement_pattern {
34 __u8 length;
35 __u8 data_type;
36 __u8 start_byte;
07d85dbe 37 __u8 pattern[];
a2a4dedf
AP		 38};
39
40struct msft_le_monitor_advertisement_pattern_data {
41 __u8 count;
07d85dbe 42 __u8 data[];
a2a4dedf
AP		 43};
44
45struct msft_cp_le_monitor_advertisement {
46 __u8 sub_opcode;
47 __s8 rssi_high;
48 __s8 rssi_low;
49 __u8 rssi_low_interval;
50 __u8 rssi_sampling_period;
51 __u8 cond_type;
07d85dbe 52 __u8 data[];
a2a4dedf
AP		 53} __packed;
54
55struct msft_rp_le_monitor_advertisement {
56 __u8 status;
57 __u8 sub_opcode;
58 __u8 handle;
59} __packed;
60
66bd095a
AP		 61#define MSFT_OP_LE_CANCEL_MONITOR_ADVERTISEMENT 0x04
62struct msft_cp_le_cancel_monitor_advertisement {
63 __u8 sub_opcode;
64 __u8 handle;
65} __packed;
66
67struct msft_rp_le_cancel_monitor_advertisement {
68 __u8 status;
69 __u8 sub_opcode;
70} __packed;
71
394566bf
AP		 72#define MSFT_OP_LE_SET_ADVERTISEMENT_FILTER_ENABLE 0x05
73struct msft_cp_le_set_advertisement_filter_enable {
74 __u8 sub_opcode;
75 __u8 enable;
76} __packed;
77
78struct msft_rp_le_set_advertisement_filter_enable {
79 __u8 status;
80 __u8 sub_opcode;
81} __packed;
82
3368aa35
MM		 83#define MSFT_EV_LE_MONITOR_DEVICE 0x02
84struct msft_ev_le_monitor_device {
85 __u8 addr_type;
86 bdaddr_t bdaddr;
87 __u8 monitor_handle;
88 __u8 monitor_state;
89} __packed;
90
a2a4dedf
AP		 91struct msft_monitor_advertisement_handle_data {
92 __u8 msft_handle;
93 __u16 mgmt_handle;
94 struct list_head list;
95};
96
145373cb
MC		 97struct msft_data {
98 __u64 features;
99 __u8 evt_prefix_len;
100 __u8 *evt_prefix;
a2a4dedf 101 struct list_head handle_map;
182ee45d 102 __u8 resuming;
ce81843b 103 __u8 suspending;
394566bf 104 __u8 filter_enabled;
145373cb
MC		 105};
106
a2a4dedf
AP		 107bool msft_monitor_supported(struct hci_dev *hdev)
108{
109 return !!(msft_get_features(hdev) & MSFT_FEATURE_MASK_LE_ADV_MONITOR);
110}
111
145373cb
MC		 112static bool read_supported_features(struct hci_dev *hdev,
113 struct msft_data *msft)
114{
115 struct msft_cp_read_supported_features cp;
116 struct msft_rp_read_supported_features *rp;
117 struct sk_buff *skb;
118
119 cp.sub_opcode = MSFT_OP_READ_SUPPORTED_FEATURES;
120
121 skb = __hci_cmd_sync(hdev, hdev->msft_opcode, sizeof(cp), &cp,
122 HCI_CMD_TIMEOUT);
ce78e557
SH		 123 if (IS_ERR_OR_NULL(skb)) {
124 if (!skb)
125 skb = ERR_PTR(-EIO);
126
145373cb
MC		 127 bt_dev_err(hdev, "Failed to read MSFT supported features (%ld)",
128 PTR_ERR(skb));
129 return false;
130 }
131
132 if (skb->len < sizeof(*rp)) {
133 bt_dev_err(hdev, "MSFT supported features length mismatch");
134 goto failed;
135 }
136
137 rp = (struct msft_rp_read_supported_features *)skb->data;
138
139 if (rp->sub_opcode != MSFT_OP_READ_SUPPORTED_FEATURES)
140 goto failed;
141
142 if (rp->evt_prefix_len > 0) {
143 msft->evt_prefix = kmemdup(rp->evt_prefix, rp->evt_prefix_len,
144 GFP_KERNEL);
145 if (!msft->evt_prefix)
146 goto failed;
147 }
148
149 msft->evt_prefix_len = rp->evt_prefix_len;
150 msft->features = __le64_to_cpu(rp->features);
151
a61d6718
MH		 152 if (msft->features & MSFT_FEATURE_MASK_CURVE_VALIDITY)
153 hdev->msft_curve_validity = true;
154
145373cb
MC		 155 kfree_skb(skb);
156 return true;
157
158failed:
159 kfree_skb(skb);
160 return false;
161}
162
182ee45d
LAD		 163/* is_mgmt = true matches the handle exposed to userspace via mgmt.
164 * is_mgmt = false matches the handle used by the msft controller.
165 * This function requires the caller holds hdev->lock
166 */
167static struct msft_monitor_advertisement_handle_data *msft_find_handle_data
168 (struct hci_dev *hdev, u16 handle, bool is_mgmt)
169{
170 struct msft_monitor_advertisement_handle_data *entry;
171 struct msft_data *msft = hdev->msft_data;
172
173 list_for_each_entry(entry, &msft->handle_map, list) {
174 if (is_mgmt && entry->mgmt_handle == handle)
175 return entry;
176 if (!is_mgmt && entry->msft_handle == handle)
177 return entry;
178 }
179
180 return NULL;
181}
182
3368aa35
MM		 183/* This function requires the caller holds hdev->lock */
184static int msft_monitor_device_del(struct hci_dev *hdev, __u16 mgmt_handle,
8d7f1677
MM		 185 bdaddr_t *bdaddr, __u8 addr_type,
186 bool notify)
3368aa35
MM		 187{
188 struct monitored_device *dev, *tmp;
189 int count = 0;
190
191 list_for_each_entry_safe(dev, tmp, &hdev->monitored_devices, list) {
192 /* mgmt_handle == 0 indicates remove all devices, whereas,
193 * bdaddr == NULL indicates remove all devices matching the
194 * mgmt_handle.
195 */
196 if ((!mgmt_handle || dev->handle == mgmt_handle) &&
197 (!bdaddr || (!bacmp(bdaddr, &dev->bdaddr) &&
198 addr_type == dev->addr_type))) {
8d7f1677
MM		 199 if (notify && dev->notified) {
200 mgmt_adv_monitor_device_lost(hdev, dev->handle,
201 &dev->bdaddr,
202 dev->addr_type);
203 }
204
3368aa35
MM		 205 list_del(&dev->list);
206 kfree(dev);
207 count++;
208 }
209 }
210
211 return count;
212}
213
b747a836
MM		 214static int msft_le_monitor_advertisement_cb(struct hci_dev *hdev, u16 opcode,
215 struct adv_monitor *monitor,
216 struct sk_buff *skb)
182ee45d
LAD		 217{
218 struct msft_rp_le_monitor_advertisement *rp;
182ee45d
LAD		 219 struct msft_monitor_advertisement_handle_data *handle_data;
220 struct msft_data *msft = hdev->msft_data;
b747a836 221 int status = 0;
182ee45d
LAD		 222
223 hci_dev_lock(hdev);
224
b747a836
MM		 225 rp = (struct msft_rp_le_monitor_advertisement *)skb->data;
226 if (skb->len < sizeof(*rp)) {
182ee45d
LAD		 227 status = HCI_ERROR_UNSPECIFIED;
228 goto unlock;
229 }
230
b747a836 231 status = rp->status;
182ee45d
LAD		 232 if (status)
233 goto unlock;
234
182ee45d
LAD		 235 handle_data = kmalloc(sizeof(*handle_data), GFP_KERNEL);
236 if (!handle_data) {
237 status = HCI_ERROR_UNSPECIFIED;
238 goto unlock;
239 }
240
241 handle_data->mgmt_handle = monitor->handle;
242 handle_data->msft_handle = rp->handle;
243 INIT_LIST_HEAD(&handle_data->list);
244 list_add(&handle_data->list, &msft->handle_map);
245
246 monitor->state = ADV_MONITOR_STATE_OFFLOADED;
247
248unlock:
b747a836 249 if (status)
182ee45d
LAD		 250 hci_free_adv_monitor(hdev, monitor);
251
252 hci_dev_unlock(hdev);
253
b747a836 254 return status;
182ee45d
LAD		 255}
256
7cf5c297
MM		 257static int msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
258 u16 opcode,
259 struct adv_monitor *monitor,
260 struct sk_buff *skb)
ce81843b 261{
182ee45d 262 struct msft_rp_le_cancel_monitor_advertisement *rp;
182ee45d 263 struct msft_monitor_advertisement_handle_data *handle_data;
ce81843b 264 struct msft_data *msft = hdev->msft_data;
7cf5c297 265 int status = 0;
182ee45d
LAD		 266
267 rp = (struct msft_rp_le_cancel_monitor_advertisement *)skb->data;
268 if (skb->len < sizeof(*rp)) {
269 status = HCI_ERROR_UNSPECIFIED;
270 goto done;
271 }
272
7cf5c297
MM		 273 status = rp->status;
274 if (status)
275 goto done;
276
182ee45d
LAD		 277 hci_dev_lock(hdev);
278
7cf5c297 279 handle_data = msft_find_handle_data(hdev, monitor->handle, true);
182ee45d
LAD		 280
281 if (handle_data) {
7cf5c297 282 if (monitor->state == ADV_MONITOR_STATE_OFFLOADED)
182ee45d
LAD		 283 monitor->state = ADV_MONITOR_STATE_REGISTERED;
284
285 /* Do not free the monitor if it is being removed due to
286 * suspend. It will be re-monitored on resume.
287 */
7cf5c297 288 if (!msft->suspending) {
182ee45d
LAD		 289 hci_free_adv_monitor(hdev, monitor);
290
37b63c68
MM		 291 /* Clear any monitored devices by this Adv Monitor */
292 msft_monitor_device_del(hdev, handle_data->mgmt_handle,
293 NULL, 0, false);
294 }
3368aa35 295
182ee45d
LAD		 296 list_del(&handle_data->list);
297 kfree(handle_data);
298 }
299
182ee45d
LAD		 300 hci_dev_unlock(hdev);
301
302done:
7cf5c297 303 return status;
182ee45d
LAD		 304}
305
7cf5c297 306/* This function requires the caller holds hci_req_sync_lock */
182ee45d
LAD		 307static int msft_remove_monitor_sync(struct hci_dev *hdev,
308 struct adv_monitor *monitor)
309{
310 struct msft_cp_le_cancel_monitor_advertisement cp;
311 struct msft_monitor_advertisement_handle_data *handle_data;
312 struct sk_buff *skb;
182ee45d
LAD		 313
314 handle_data = msft_find_handle_data(hdev, monitor->handle, true);
315
316 /* If no matched handle, just remove without telling controller */
317 if (!handle_data)
318 return -ENOENT;
319
320 cp.sub_opcode = MSFT_OP_LE_CANCEL_MONITOR_ADVERTISEMENT;
321 cp.handle = handle_data->msft_handle;
322
323 skb = __hci_cmd_sync(hdev, hdev->msft_opcode, sizeof(cp), &cp,
324 HCI_CMD_TIMEOUT);
ce78e557
SH		 325 if (IS_ERR_OR_NULL(skb)) {
326 if (!skb)
327 return -EIO;
182ee45d 328 return PTR_ERR(skb);
ce78e557 329 }
182ee45d 330
7cf5c297
MM		 331 return msft_le_cancel_monitor_advertisement_cb(hdev, hdev->msft_opcode,
332 monitor, skb);
182ee45d
LAD		 333}
334
335/* This function requires the caller holds hci_req_sync_lock */
336int msft_suspend_sync(struct hci_dev *hdev)
337{
338 struct msft_data *msft = hdev->msft_data;
339 struct adv_monitor *monitor;
340 int handle = 0;
341
342 if (!msft || !msft_monitor_supported(hdev))
343 return 0;
344
345 msft->suspending = true;
346
347 while (1) {
348 monitor = idr_get_next(&hdev->adv_monitors_idr, &handle);
349 if (!monitor)
350 break;
351
352 msft_remove_monitor_sync(hdev, monitor);
ce81843b 353
ce81843b
MM		 354 handle++;
355 }
182ee45d
LAD		 356
357 /* All monitors have been removed */
358 msft->suspending = false;
359
360 return 0;
ce81843b
MM		 361}
362
182ee45d 363static bool msft_monitor_rssi_valid(struct adv_monitor *monitor)
ce81843b 364{
182ee45d 365 struct adv_rssi_thresholds *r = &monitor->rssi;
ce81843b 366
182ee45d
LAD		 367 if (r->high_threshold < MSFT_RSSI_THRESHOLD_VALUE_MIN ||
368 r->high_threshold > MSFT_RSSI_THRESHOLD_VALUE_MAX ||
369 r->low_threshold < MSFT_RSSI_THRESHOLD_VALUE_MIN ||
370 r->low_threshold > MSFT_RSSI_THRESHOLD_VALUE_MAX)
371 return false;
ce81843b 372
182ee45d
LAD		 373 /* High_threshold_timeout is not supported,
374 * once high_threshold is reached, events are immediately reported.
375 */
376 if (r->high_threshold_timeout != 0)
377 return false;
378
379 if (r->low_threshold_timeout > MSFT_RSSI_LOW_TIMEOUT_MAX)
380 return false;
381
382 /* Sampling period from 0x00 to 0xFF are all allowed */
383 return true;
384}
385
386static bool msft_monitor_pattern_valid(struct adv_monitor *monitor)
387{
388 return msft_monitor_rssi_valid(monitor);
389 /* No additional check needed for pattern-based monitor */
390}
391
392static int msft_add_monitor_sync(struct hci_dev *hdev,
393 struct adv_monitor *monitor)
394{
395 struct msft_cp_le_monitor_advertisement *cp;
396 struct msft_le_monitor_advertisement_pattern_data *pattern_data;
397 struct msft_le_monitor_advertisement_pattern *pattern;
398 struct adv_pattern *entry;
399 size_t total_size = sizeof(*cp) + sizeof(*pattern_data);
400 ptrdiff_t offset = 0;
401 u8 pattern_count = 0;
402 struct sk_buff *skb;
182ee45d
LAD		 403
404 if (!msft_monitor_pattern_valid(monitor))
405 return -EINVAL;
406
407 list_for_each_entry(entry, &monitor->patterns, list) {
408 pattern_count++;
409 total_size += sizeof(*pattern) + entry->length;
ce81843b 410 }
182ee45d
LAD		 411
412 cp = kmalloc(total_size, GFP_KERNEL);
413 if (!cp)
414 return -ENOMEM;
415
416 cp->sub_opcode = MSFT_OP_LE_MONITOR_ADVERTISEMENT;
417 cp->rssi_high = monitor->rssi.high_threshold;
418 cp->rssi_low = monitor->rssi.low_threshold;
419 cp->rssi_low_interval = (u8)monitor->rssi.low_threshold_timeout;
420 cp->rssi_sampling_period = monitor->rssi.sampling_period;
421
422 cp->cond_type = MSFT_MONITOR_ADVERTISEMENT_TYPE_PATTERN;
423
424 pattern_data = (void *)cp->data;
425 pattern_data->count = pattern_count;
426
427 list_for_each_entry(entry, &monitor->patterns, list) {
428 pattern = (void *)(pattern_data->data + offset);
429 /* the length also includes data_type and offset */
430 pattern->length = entry->length + 2;
431 pattern->data_type = entry->ad_type;
432 pattern->start_byte = entry->offset;
433 memcpy(pattern->pattern, entry->value, entry->length);
434 offset += sizeof(*pattern) + entry->length;
435 }
436
437 skb = __hci_cmd_sync(hdev, hdev->msft_opcode, total_size, cp,
438 HCI_CMD_TIMEOUT);
439 kfree(cp);
440
ce78e557
SH		 441 if (IS_ERR_OR_NULL(skb)) {
442 if (!skb)
443 return -EIO;
182ee45d 444 return PTR_ERR(skb);
ce78e557 445 }
182ee45d 446
b747a836
MM		 447 return msft_le_monitor_advertisement_cb(hdev, hdev->msft_opcode,
448 monitor, skb);
449}
182ee45d 450
b747a836
MM		 451/* This function requires the caller holds hci_req_sync_lock */
452static void reregister_monitor(struct hci_dev *hdev)
453{
454 struct adv_monitor *monitor;
455 struct msft_data *msft = hdev->msft_data;
456 int handle = 0;
182ee45d 457
b747a836
MM		 458 if (!msft)
459 return;
460
461 msft->resuming = true;
462
463 while (1) {
464 monitor = idr_get_next(&hdev->adv_monitors_idr, &handle);
465 if (!monitor)
466 break;
467
468 msft_add_monitor_sync(hdev, monitor);
469
470 handle++;
471 }
472
473 /* All monitors have been reregistered */
474 msft->resuming = false;
ce81843b
MM		 475}
476
182ee45d
LAD		 477/* This function requires the caller holds hci_req_sync_lock */
478int msft_resume_sync(struct hci_dev *hdev)
ce81843b
MM		 479{
480 struct msft_data *msft = hdev->msft_data;
481
182ee45d
LAD		 482 if (!msft || !msft_monitor_supported(hdev))
483 return 0;
ce81843b 484
37b63c68
MM		 485 hci_dev_lock(hdev);
486
487 /* Clear already tracked devices on resume. Once the monitors are
488 * reregistered, devices in range will be found again after resume.
489 */
490 hdev->advmon_pend_notify = false;
491 msft_monitor_device_del(hdev, 0, NULL, 0, true);
492
493 hci_dev_unlock(hdev);
494
b747a836 495 reregister_monitor(hdev);
182ee45d
LAD		 496
497 return 0;
ce81843b
MM		 498}
499
b747a836 500/* This function requires the caller holds hci_req_sync_lock */
145373cb
MC		 501void msft_do_open(struct hci_dev *hdev)
502{
5031ffcc 503 struct msft_data *msft = hdev->msft_data;
145373cb
MC		 504
505 if (hdev->msft_opcode == HCI_OP_NOP)
506 return;
507
5031ffcc
MC		 508 if (!msft) {
509 bt_dev_err(hdev, "MSFT extension not registered");
510 return;
511 }
512
145373cb
MC		 513 bt_dev_dbg(hdev, "Initialize MSFT extension");
514
5031ffcc
MC		 515 /* Reset existing MSFT data before re-reading */
516 kfree(msft->evt_prefix);
517 msft->evt_prefix = NULL;
518 msft->evt_prefix_len = 0;
519 msft->features = 0;
145373cb
MC		 520
521 if (!read_supported_features(hdev, msft)) {
5031ffcc 522 hdev->msft_data = NULL;
145373cb
MC		 523 kfree(msft);
524 return;
525 }
526
4a37682c 527 if (msft_monitor_supported(hdev)) {
182ee45d 528 msft->resuming = true;
394566bf 529 msft_set_filter_enable(hdev, true);
5031ffcc
MC		 530 /* Monitors get removed on power off, so we need to explicitly
531 * tell the controller to re-monitor.
532 */
b747a836 533 reregister_monitor(hdev);
4a37682c 534 }
145373cb
MC		 535}
536
537void msft_do_close(struct hci_dev *hdev)
538{
539 struct msft_data *msft = hdev->msft_data;
a2a4dedf 540 struct msft_monitor_advertisement_handle_data *handle_data, *tmp;
4a37682c 541 struct adv_monitor *monitor;
145373cb
MC		 542
543 if (!msft)
544 return;
545
546 bt_dev_dbg(hdev, "Cleanup of MSFT extension");
547
5031ffcc
MC		 548 /* The controller will silently remove all monitors on power off.
549 * Therefore, remove handle_data mapping and reset monitor state.
550 */
a2a4dedf 551 list_for_each_entry_safe(handle_data, tmp, &msft->handle_map, list) {
4a37682c
AP		 552 monitor = idr_find(&hdev->adv_monitors_idr,
553 handle_data->mgmt_handle);
554
555 if (monitor && monitor->state == ADV_MONITOR_STATE_OFFLOADED)
556 monitor->state = ADV_MONITOR_STATE_REGISTERED;
557
a2a4dedf
AP		 558 list_del(&handle_data->list);
559 kfree(handle_data);
560 }
3368aa35
MM		 561
562 hci_dev_lock(hdev);
563
8d7f1677
MM		 564 /* Clear any devices that are being monitored and notify device lost */
565 hdev->advmon_pend_notify = false;
566 msft_monitor_device_del(hdev, 0, NULL, 0, true);
3368aa35
MM		 567
568 hci_dev_unlock(hdev);
5031ffcc
MC		 569}
570
571void msft_register(struct hci_dev *hdev)
572{
573 struct msft_data *msft = NULL;
574
575 bt_dev_dbg(hdev, "Register MSFT extension");
576
577 msft = kzalloc(sizeof(*msft), GFP_KERNEL);
578 if (!msft) {
579 bt_dev_err(hdev, "Failed to register MSFT extension");
580 return;
581 }
582
583 INIT_LIST_HEAD(&msft->handle_map);
584 hdev->msft_data = msft;
585}
586
587void msft_unregister(struct hci_dev *hdev)
588{
589 struct msft_data *msft = hdev->msft_data;
590
591 if (!msft)
592 return;
593
594 bt_dev_dbg(hdev, "Unregister MSFT extension");
595
596 hdev->msft_data = NULL;
a2a4dedf 597
145373cb
MC		 598 kfree(msft->evt_prefix);
599 kfree(msft);
600}
601
3368aa35
MM		 602/* This function requires the caller holds hdev->lock */
603static void msft_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr,
604 __u8 addr_type, __u16 mgmt_handle)
605{
606 struct monitored_device *dev;
607
608 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
609 if (!dev) {
610 bt_dev_err(hdev, "MSFT vendor event %u: no memory",
611 MSFT_EV_LE_MONITOR_DEVICE);
612 return;
613 }
614
615 bacpy(&dev->bdaddr, bdaddr);
616 dev->addr_type = addr_type;
617 dev->handle = mgmt_handle;
618 dev->notified = false;
619
620 INIT_LIST_HEAD(&dev->list);
621 list_add(&dev->list, &hdev->monitored_devices);
8d7f1677 622 hdev->advmon_pend_notify = true;
3368aa35
MM		 623}
624
625/* This function requires the caller holds hdev->lock */
626static void msft_device_lost(struct hci_dev *hdev, bdaddr_t *bdaddr,
627 __u8 addr_type, __u16 mgmt_handle)
628{
8d7f1677
MM		 629 if (!msft_monitor_device_del(hdev, mgmt_handle, bdaddr, addr_type,
630 true)) {
3368aa35
MM		 631 bt_dev_err(hdev, "MSFT vendor event %u: dev %pMR not in list",
632 MSFT_EV_LE_MONITOR_DEVICE, bdaddr);
633 }
634}
635
636static void *msft_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
637 u8 ev, size_t len)
638{
639 void *data;
640
641 data = skb_pull_data(skb, len);
642 if (!data)
643 bt_dev_err(hdev, "Malformed MSFT vendor event: 0x%02x", ev);
644
645 return data;
646}
647
648/* This function requires the caller holds hdev->lock */
649static void msft_monitor_device_evt(struct hci_dev *hdev, struct sk_buff *skb)
650{
651 struct msft_ev_le_monitor_device *ev;
652 struct msft_monitor_advertisement_handle_data *handle_data;
653 u8 addr_type;
654
655 ev = msft_skb_pull(hdev, skb, MSFT_EV_LE_MONITOR_DEVICE, sizeof(*ev));
656 if (!ev)
657 return;
658
659 bt_dev_dbg(hdev,
660 "MSFT vendor event 0x%02x: handle 0x%04x state %d addr %pMR",
661 MSFT_EV_LE_MONITOR_DEVICE, ev->monitor_handle,
662 ev->monitor_state, &ev->bdaddr);
663
664 handle_data = msft_find_handle_data(hdev, ev->monitor_handle, false);
5201d23c
SH		 665 if (!handle_data)
666 return;
3368aa35
MM		 667
668 switch (ev->addr_type) {
669 case ADDR_LE_DEV_PUBLIC:
670 addr_type = BDADDR_LE_PUBLIC;
671 break;
672
673 case ADDR_LE_DEV_RANDOM:
674 addr_type = BDADDR_LE_RANDOM;
675 break;
676
677 default:
678 bt_dev_err(hdev,
679 "MSFT vendor event 0x%02x: unknown addr type 0x%02x",
680 MSFT_EV_LE_MONITOR_DEVICE, ev->addr_type);
681 return;
682 }
683
684 if (ev->monitor_state)
685 msft_device_found(hdev, &ev->bdaddr, addr_type,
686 handle_data->mgmt_handle);
687 else
688 msft_device_lost(hdev, &ev->bdaddr, addr_type,
689 handle_data->mgmt_handle);
690}
691
3e54c589 692void msft_vendor_evt(struct hci_dev *hdev, void *data, struct sk_buff *skb)
145373cb
MC		 693{
694 struct msft_data *msft = hdev->msft_data;
3368aa35
MM		 695 u8 *evt_prefix;
696 u8 *evt;
145373cb
MC		 697
698 if (!msft)
699 return;
700
701 /* When the extension has defined an event prefix, check that it
702 * matches, and otherwise just return.
703 */
704 if (msft->evt_prefix_len > 0) {
3368aa35
MM		 705 evt_prefix = msft_skb_pull(hdev, skb, 0, msft->evt_prefix_len);
706 if (!evt_prefix)
145373cb
MC		 707 return;
708
3368aa35 709 if (memcmp(evt_prefix, msft->evt_prefix, msft->evt_prefix_len))
145373cb 710 return;
145373cb
MC		 711 }
712
713 /* Every event starts at least with an event code and the rest of
714 * the data is variable and depends on the event code.
715 */
716 if (skb->len < 1)
717 return;
718
3368aa35
MM		 719 evt = msft_skb_pull(hdev, skb, 0, sizeof(*evt));
720 if (!evt)
721 return;
722
723 hci_dev_lock(hdev);
724
725 switch (*evt) {
726 case MSFT_EV_LE_MONITOR_DEVICE:
727 msft_monitor_device_evt(hdev, skb);
728 break;
145373cb 729
3368aa35
MM		 730 default:
731 bt_dev_dbg(hdev, "MSFT vendor event 0x%02x", *evt);
732 break;
733 }
734
735 hci_dev_unlock(hdev);
145373cb 736}
e5e1e7fd
MC		 737
738__u64 msft_get_features(struct hci_dev *hdev)
739{
740 struct msft_data *msft = hdev->msft_data;
741
a2a4dedf
AP		 742 return msft ? msft->features : 0;
743}
744
394566bf
AP		 745static void msft_le_set_advertisement_filter_enable_cb(struct hci_dev *hdev,
746 u8 status, u16 opcode,
747 struct sk_buff *skb)
748{
749 struct msft_cp_le_set_advertisement_filter_enable *cp;
750 struct msft_rp_le_set_advertisement_filter_enable *rp;
751 struct msft_data *msft = hdev->msft_data;
752
753 rp = (struct msft_rp_le_set_advertisement_filter_enable *)skb->data;
754 if (skb->len < sizeof(*rp))
755 return;
756
757 /* Error 0x0C would be returned if the filter enabled status is
758 * already set to whatever we were trying to set.
759 * Although the default state should be disabled, some controller set
760 * the initial value to enabled. Because there is no way to know the
761 * actual initial value before sending this command, here we also treat
762 * error 0x0C as success.
763 */
764 if (status != 0x00 && status != 0x0C)
765 return;
766
767 hci_dev_lock(hdev);
768
769 cp = hci_sent_cmd_data(hdev, hdev->msft_opcode);
770 msft->filter_enabled = cp->enable;
771
772 if (status == 0x0C)
773 bt_dev_warn(hdev, "MSFT filter_enable is already %s",
774 cp->enable ? "on" : "off");
775
776 hci_dev_unlock(hdev);
777}
778
b747a836 779/* This function requires the caller holds hci_req_sync_lock */
4a37682c
AP		 780int msft_add_monitor_pattern(struct hci_dev *hdev, struct adv_monitor *monitor)
781{
782 struct msft_data *msft = hdev->msft_data;
783
784 if (!msft)
785 return -EOPNOTSUPP;
786
182ee45d 787 if (msft->resuming || msft->suspending)
4a37682c
AP		 788 return -EBUSY;
789
b747a836 790 return msft_add_monitor_sync(hdev, monitor);
4a37682c
AP		 791}
792
7cf5c297
MM		 793/* This function requires the caller holds hci_req_sync_lock */
794int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
ce81843b
MM		 795{
796 struct msft_data *msft = hdev->msft_data;
797
798 if (!msft)
799 return -EOPNOTSUPP;
800
182ee45d 801 if (msft->resuming || msft->suspending)
ce81843b
MM		 802 return -EBUSY;
803
7cf5c297 804 return msft_remove_monitor_sync(hdev, monitor);
ce81843b
MM		 805}
806
bf6a4e30 807void msft_req_add_set_filter_enable(struct hci_request *req, bool enable)
394566bf 808{
bf6a4e30 809 struct hci_dev *hdev = req->hdev;
394566bf 810 struct msft_cp_le_set_advertisement_filter_enable cp;
bf6a4e30
HC		 811
812 cp.sub_opcode = MSFT_OP_LE_SET_ADVERTISEMENT_FILTER_ENABLE;
813 cp.enable = enable;
814
815 hci_req_add(req, hdev->msft_opcode, sizeof(cp), &cp);
816}
817
818int msft_set_filter_enable(struct hci_dev *hdev, bool enable)
819{
394566bf
AP		 820 struct hci_request req;
821 struct msft_data *msft = hdev->msft_data;
822 int err;
823
824 if (!msft)
825 return -EOPNOTSUPP;
826
394566bf 827 hci_req_init(&req, hdev);
bf6a4e30 828 msft_req_add_set_filter_enable(&req, enable);
394566bf
AP		 829 err = hci_req_run_skb(&req, msft_le_set_advertisement_filter_enable_cb);
830
831 return err;
832}
a61d6718
MH		 833
834bool msft_curve_validity(struct hci_dev *hdev)
835{
836 return hdev->msft_curve_validity;
837}
Linux 6.x block layer and io_uring tree(s)