summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/mvm/ftm-responder.c
blob: dd3662b9a5bccf130c4fbd44d405e8a1b954467e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
 * Copyright (C) 2018 - 2020 Intel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 * Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
 * Copyright (C) 2018 - 2020 Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <net/cfg80211.h>
#include <linux/etherdevice.h>
#include "mvm.h"
#include "constants.h"

struct iwl_mvm_pasn_sta {
	struct list_head list;
	struct iwl_mvm_int_sta int_sta;
	u8 addr[ETH_ALEN];
};

struct iwl_mvm_pasn_hltk_data {
	u8 *addr;
	u8 cipher;
	u8 *hltk;
};

static int iwl_mvm_ftm_responder_set_bw_v1(struct cfg80211_chan_def *chandef,
					   u8 *bw, u8 *ctrl_ch_position)
{
	switch (chandef->width) {
	case NL80211_CHAN_WIDTH_20_NOHT:
		*bw = IWL_TOF_BW_20_LEGACY;
		break;
	case NL80211_CHAN_WIDTH_20:
		*bw = IWL_TOF_BW_20_HT;
		break;
	case NL80211_CHAN_WIDTH_40:
		*bw = IWL_TOF_BW_40;
		*ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
		break;
	case NL80211_CHAN_WIDTH_80:
		*bw = IWL_TOF_BW_80;
		*ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
		break;
	default:
		return -ENOTSUPP;
	}

	return 0;
}

static int iwl_mvm_ftm_responder_set_bw_v2(struct cfg80211_chan_def *chandef,
					   u8 *format_bw,
					   u8 *ctrl_ch_position)
{
	switch (chandef->width) {
	case NL80211_CHAN_WIDTH_20_NOHT:
		*format_bw = IWL_LOCATION_FRAME_FORMAT_LEGACY;
		*format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS;
		break;
	case NL80211_CHAN_WIDTH_20:
		*format_bw = IWL_LOCATION_FRAME_FORMAT_HT;
		*format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS;
		break;
	case NL80211_CHAN_WIDTH_40:
		*format_bw = IWL_LOCATION_FRAME_FORMAT_HT;
		*format_bw |= IWL_LOCATION_BW_40MHZ << LOCATION_BW_POS;
		*ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
		break;
	case NL80211_CHAN_WIDTH_80:
		*format_bw = IWL_LOCATION_FRAME_FORMAT_VHT;
		*format_bw |= IWL_LOCATION_BW_80MHZ << LOCATION_BW_POS;
		*ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
		break;
	default:
		return -ENOTSUPP;
	}

	return 0;
}

static int
iwl_mvm_ftm_responder_cmd(struct iwl_mvm *mvm,
			  struct ieee80211_vif *vif,
			  struct cfg80211_chan_def *chandef)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	/*
	 * The command structure is the same for versions 6 and 7, (only the
	 * field interpretation is different), so the same struct can be use
	 * for all cases.
	 */
	struct iwl_tof_responder_config_cmd cmd = {
		.channel_num = chandef->chan->hw_value,
		.cmd_valid_fields =
			cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_CHAN_INFO |
				    IWL_TOF_RESPONDER_CMD_VALID_BSSID |
				    IWL_TOF_RESPONDER_CMD_VALID_STA_ID),
		.sta_id = mvmvif->bcast_sta.sta_id,
	};
	u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP,
					   TOF_RESPONDER_CONFIG_CMD, 6);
	int err;

	lockdep_assert_held(&mvm->mutex);

	if (cmd_ver == 7)
		err = iwl_mvm_ftm_responder_set_bw_v2(chandef, &cmd.format_bw,
						      &cmd.ctrl_ch_position);
	else
		err = iwl_mvm_ftm_responder_set_bw_v1(chandef, &cmd.format_bw,
						      &cmd.ctrl_ch_position);

	if (err) {
		IWL_ERR(mvm, "Failed to set responder bandwidth\n");
		return err;
	}

	memcpy(cmd.bssid, vif->addr, ETH_ALEN);

	return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(TOF_RESPONDER_CONFIG_CMD,
						    LOCATION_GROUP, 0),
				    0, sizeof(cmd), &cmd);
}

static int
iwl_mvm_ftm_responder_dyn_cfg_v2(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 struct ieee80211_ftm_responder_params *params)
{
	struct iwl_tof_responder_dyn_config_cmd_v2 cmd = {
		.lci_len = cpu_to_le32(params->lci_len + 2),
		.civic_len = cpu_to_le32(params->civicloc_len + 2),
	};
	u8 data[IWL_LCI_CIVIC_IE_MAX_SIZE] = {0};
	struct iwl_host_cmd hcmd = {
		.id = iwl_cmd_id(TOF_RESPONDER_DYN_CONFIG_CMD,
				 LOCATION_GROUP, 0),
		.data[0] = &cmd,
		.len[0] = sizeof(cmd),
		.data[1] = &data,
		/* .len[1] set later */
		/* may not be able to DMA from stack */
		.dataflags[1] = IWL_HCMD_DFL_DUP,
	};
	u32 aligned_lci_len = ALIGN(params->lci_len + 2, 4);
	u32 aligned_civicloc_len = ALIGN(params->civicloc_len + 2, 4);
	u8 *pos = data;

	lockdep_assert_held(&mvm->mutex);

	if (aligned_lci_len + aligned_civicloc_len > sizeof(data)) {
		IWL_ERR(mvm, "LCI/civicloc data too big (%zd + %zd)\n",
			params->lci_len, params->civicloc_len);
		return -ENOBUFS;
	}

	pos[0] = WLAN_EID_MEASURE_REPORT;
	pos[1] = params->lci_len;
	memcpy(pos + 2, params->lci, params->lci_len);

	pos += aligned_lci_len;
	pos[0] = WLAN_EID_MEASURE_REPORT;
	pos[1] = params->civicloc_len;
	memcpy(pos + 2, params->civicloc, params->civicloc_len);

	hcmd.len[1] = aligned_lci_len + aligned_civicloc_len;

	return iwl_mvm_send_cmd(mvm, &hcmd);
}

static int
iwl_mvm_ftm_responder_dyn_cfg_v3(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 struct ieee80211_ftm_responder_params *params,
				 struct iwl_mvm_pasn_hltk_data *hltk_data)
{
	struct iwl_tof_responder_dyn_config_cmd cmd;
	struct iwl_host_cmd hcmd = {
		.id = iwl_cmd_id(TOF_RESPONDER_DYN_CONFIG_CMD,
				 LOCATION_GROUP, 0),
		.data[0] = &cmd,
		.len[0] = sizeof(cmd),
		/* may not be able to DMA from stack */
		.dataflags[0] = IWL_HCMD_DFL_DUP,
	};

	lockdep_assert_held(&mvm->mutex);

	cmd.valid_flags = 0;

	if (params) {
		if (params->lci_len + 2 > sizeof(cmd.lci_buf) ||
		    params->civicloc_len + 2 > sizeof(cmd.civic_buf)) {
			IWL_ERR(mvm,
				"LCI/civic data too big (lci=%zd, civic=%zd)\n",
				params->lci_len, params->civicloc_len);
			return -ENOBUFS;
		}

		cmd.lci_buf[0] = WLAN_EID_MEASURE_REPORT;
		cmd.lci_buf[1] = params->lci_len;
		memcpy(cmd.lci_buf + 2, params->lci, params->lci_len);
		cmd.lci_len = params->lci_len + 2;

		cmd.civic_buf[0] = WLAN_EID_MEASURE_REPORT;
		cmd.civic_buf[1] = params->civicloc_len;
		memcpy(cmd.civic_buf + 2, params->civicloc,
		       params->civicloc_len);
		cmd.civic_len = params->civicloc_len + 2;

		cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_LCI |
			IWL_RESPONDER_DYN_CFG_VALID_CIVIC;
	}

	if (hltk_data) {
		if (hltk_data->cipher > IWL_LOCATION_CIPHER_GCMP_256) {
			IWL_ERR(mvm, "invalid cipher: %u\n",
				hltk_data->cipher);
			return -EINVAL;
		}

		cmd.cipher = hltk_data->cipher;
		memcpy(cmd.addr, hltk_data->addr, sizeof(cmd.addr));
		memcpy(cmd.hltk_buf, hltk_data->hltk, sizeof(cmd.hltk_buf));
		cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_PASN_STA;
	}

	return iwl_mvm_send_cmd(mvm, &hcmd);
}

static int
iwl_mvm_ftm_responder_dyn_cfg_cmd(struct iwl_mvm *mvm,
				  struct ieee80211_vif *vif,
				  struct ieee80211_ftm_responder_params *params)
{
	int ret;
	u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP,
					   TOF_RESPONDER_DYN_CONFIG_CMD, 2);

	switch (cmd_ver) {
	case 2:
		ret = iwl_mvm_ftm_responder_dyn_cfg_v2(mvm, vif,
						       params);
		break;
	case 3:
		ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif,
						       params, NULL);
		break;
	default:
		IWL_ERR(mvm, "Unsupported DYN_CONFIG_CMD version %u\n",
			cmd_ver);
		ret = -ENOTSUPP;
	}

	return ret;
}

static void iwl_mvm_resp_del_pasn_sta(struct iwl_mvm *mvm,
				      struct ieee80211_vif *vif,
				      struct iwl_mvm_pasn_sta *sta)
{
	list_del(&sta->list);
	iwl_mvm_rm_sta_id(mvm, vif, sta->int_sta.sta_id);
	iwl_mvm_dealloc_int_sta(mvm, &sta->int_sta);
	kfree(sta);
}

int iwl_mvm_ftm_respoder_add_pasn_sta(struct iwl_mvm *mvm,
				      struct ieee80211_vif *vif,
				      u8 *addr, u32 cipher, u8 *tk, u32 tk_len,
				      u8 *hltk, u32 hltk_len)
{
	int ret;
	struct iwl_mvm_pasn_sta *sta = NULL;
	struct iwl_mvm_pasn_hltk_data hltk_data = {
		.addr = addr,
		.hltk = hltk,
	};
	u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP,
					   TOF_RESPONDER_DYN_CONFIG_CMD, 2);

	lockdep_assert_held(&mvm->mutex);

	if (cmd_ver < 3) {
		IWL_ERR(mvm, "Adding PASN station not supported by FW\n");
		return -ENOTSUPP;
	}

	hltk_data.cipher = iwl_mvm_cipher_to_location_cipher(cipher);
	if (hltk_data.cipher == IWL_LOCATION_CIPHER_INVALID) {
		IWL_ERR(mvm, "invalid cipher: %u\n", cipher);
		return -EINVAL;
	}

	if (tk && tk_len) {
		sta = kzalloc(sizeof(*sta), GFP_KERNEL);
		if (!sta)
			return -ENOBUFS;

		ret = iwl_mvm_add_pasn_sta(mvm, vif, &sta->int_sta, addr,
					   cipher, tk, tk_len);
		if (ret) {
			kfree(sta);
			return ret;
		}

		memcpy(sta->addr, addr, ETH_ALEN);
		list_add_tail(&sta->list, &mvm->resp_pasn_list);
	}

	ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif, NULL, &hltk_data);
	if (ret && sta)
		iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);

	return ret;
}

int iwl_mvm_ftm_resp_remove_pasn_sta(struct iwl_mvm *mvm,
				     struct ieee80211_vif *vif, u8 *addr)
{
	struct iwl_mvm_pasn_sta *sta, *prev;

	lockdep_assert_held(&mvm->mutex);

	list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list) {
		if (!memcmp(sta->addr, addr, ETH_ALEN)) {
			iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
			return 0;
		}
	}

	IWL_ERR(mvm, "FTM: PASN station %pM not found\n", addr);
	return -EINVAL;
}

int iwl_mvm_ftm_start_responder(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct ieee80211_ftm_responder_params *params;
	struct ieee80211_chanctx_conf ctx, *pctx;
	u16 *phy_ctxt_id;
	struct iwl_mvm_phy_ctxt *phy_ctxt;
	int ret;

	params = vif->bss_conf.ftmr_params;

	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON_ONCE(!vif->bss_conf.ftm_responder))
		return -EINVAL;

	if (vif->p2p || vif->type != NL80211_IFTYPE_AP ||
	    !mvmvif->ap_ibss_active) {
		IWL_ERR(mvm, "Cannot start responder, not in AP mode\n");
		return -EIO;
	}

	rcu_read_lock();
	pctx = rcu_dereference(vif->chanctx_conf);
	/* Copy the ctx to unlock the rcu and send the phy ctxt. We don't care
	 * about changes in the ctx after releasing the lock because the driver
	 * is still protected by the mutex. */
	ctx = *pctx;
	phy_ctxt_id  = (u16 *)pctx->drv_priv;
	rcu_read_unlock();

	phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx.def,
				       ctx.rx_chains_static,
				       ctx.rx_chains_dynamic);
	if (ret)
		return ret;

	ret = iwl_mvm_ftm_responder_cmd(mvm, vif, &ctx.def);
	if (ret)
		return ret;

	if (params)
		ret = iwl_mvm_ftm_responder_dyn_cfg_cmd(mvm, vif, params);

	return ret;
}

void iwl_mvm_ftm_responder_clear(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif)
{
	struct iwl_mvm_pasn_sta *sta, *prev;

	lockdep_assert_held(&mvm->mutex);

	list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list)
		iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
}

void iwl_mvm_ftm_restart_responder(struct iwl_mvm *mvm,
				   struct ieee80211_vif *vif)
{
	if (!vif->bss_conf.ftm_responder)
		return;

	iwl_mvm_ftm_responder_clear(mvm, vif);
	iwl_mvm_ftm_start_responder(mvm, vif);
}

void iwl_mvm_ftm_responder_stats(struct iwl_mvm *mvm,
				 struct iwl_rx_cmd_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_ftm_responder_stats *resp = (void *)pkt->data;
	struct cfg80211_ftm_responder_stats *stats = &mvm->ftm_resp_stats;
	u32 flags = le32_to_cpu(resp->flags);

	if (resp->success_ftm == resp->ftm_per_burst)
		stats->success_num++;
	else if (resp->success_ftm >= 2)
		stats->partial_num++;
	else
		stats->failed_num++;

	if ((flags & FTM_RESP_STAT_ASAP_REQ) &&
	    (flags & FTM_RESP_STAT_ASAP_RESP))
		stats->asap_num++;

	if (flags & FTM_RESP_STAT_NON_ASAP_RESP)
		stats->non_asap_num++;

	stats->total_duration_ms += le32_to_cpu(resp->duration) / USEC_PER_MSEC;

	if (flags & FTM_RESP_STAT_TRIGGER_UNKNOWN)
		stats->unknown_triggers_num++;

	if (flags & FTM_RESP_STAT_DUP)
		stats->reschedule_requests_num++;

	if (flags & FTM_RESP_STAT_NON_ASAP_OUT_WIN)
		stats->out_of_window_triggers_num++;
}