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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2015-2017 Intel Deutschland GmbH
4 * Copyright (C) 2018-2022 Intel Corporation
5 */
6#include <net/cfg80211.h>
7#include <linux/etherdevice.h>
8#include "mvm.h"
9#include "constants.h"
10
11struct iwl_mvm_pasn_sta {
12 struct list_head list;
13 struct iwl_mvm_int_sta int_sta;
14 u8 addr[ETH_ALEN];
15};
16
17struct iwl_mvm_pasn_hltk_data {
18 u8 *addr;
19 u8 cipher;
20 u8 *hltk;
21};
22
23static int iwl_mvm_ftm_responder_set_bw_v1(struct cfg80211_chan_def *chandef,
24 u8 *bw, u8 *ctrl_ch_position)
25{
26 switch (chandef->width) {
27 case NL80211_CHAN_WIDTH_20_NOHT:
28 *bw = IWL_TOF_BW_20_LEGACY;
29 break;
30 case NL80211_CHAN_WIDTH_20:
31 *bw = IWL_TOF_BW_20_HT;
32 break;
33 case NL80211_CHAN_WIDTH_40:
34 *bw = IWL_TOF_BW_40;
35 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
36 break;
37 case NL80211_CHAN_WIDTH_80:
38 *bw = IWL_TOF_BW_80;
39 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
40 break;
41 default:
42 return -ENOTSUPP;
43 }
44
45 return 0;
46}
47
48static int iwl_mvm_ftm_responder_set_bw_v2(struct cfg80211_chan_def *chandef,
49 u8 *format_bw, u8 *ctrl_ch_position,
50 u8 cmd_ver)
51{
52 switch (chandef->width) {
53 case NL80211_CHAN_WIDTH_20_NOHT:
54 *format_bw = IWL_LOCATION_FRAME_FORMAT_LEGACY;
55 *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS;
56 break;
57 case NL80211_CHAN_WIDTH_20:
58 *format_bw = IWL_LOCATION_FRAME_FORMAT_HT;
59 *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS;
60 break;
61 case NL80211_CHAN_WIDTH_40:
62 *format_bw = IWL_LOCATION_FRAME_FORMAT_HT;
63 *format_bw |= IWL_LOCATION_BW_40MHZ << LOCATION_BW_POS;
64 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
65 break;
66 case NL80211_CHAN_WIDTH_80:
67 *format_bw = IWL_LOCATION_FRAME_FORMAT_VHT;
68 *format_bw |= IWL_LOCATION_BW_80MHZ << LOCATION_BW_POS;
69 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
70 break;
71 case NL80211_CHAN_WIDTH_160:
72 if (cmd_ver >= 9) {
73 *format_bw = IWL_LOCATION_FRAME_FORMAT_HE;
74 *format_bw |= IWL_LOCATION_BW_160MHZ << LOCATION_BW_POS;
75 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
76 break;
77 }
78 fallthrough;
79 default:
80 return -ENOTSUPP;
81 }
82
83 return 0;
84}
85
86static void
87iwl_mvm_ftm_responder_set_ndp(struct iwl_mvm *mvm,
88 struct iwl_tof_responder_config_cmd_v9 *cmd)
89{
90 /* Up to 2 R2I STS are allowed on the responder */
91 u32 r2i_max_sts = IWL_MVM_FTM_R2I_MAX_STS < 2 ?
92 IWL_MVM_FTM_R2I_MAX_STS : 1;
93
94 cmd->r2i_ndp_params = IWL_MVM_FTM_R2I_MAX_REP |
95 (r2i_max_sts << IWL_RESPONDER_STS_POS) |
96 (IWL_MVM_FTM_R2I_MAX_TOTAL_LTF << IWL_RESPONDER_TOTAL_LTF_POS);
97 cmd->i2r_ndp_params = IWL_MVM_FTM_I2R_MAX_REP |
98 (IWL_MVM_FTM_I2R_MAX_STS << IWL_RESPONDER_STS_POS) |
99 (IWL_MVM_FTM_I2R_MAX_TOTAL_LTF << IWL_RESPONDER_TOTAL_LTF_POS);
100 cmd->cmd_valid_fields |=
101 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_NDP_PARAMS);
102}
103
104static int
105iwl_mvm_ftm_responder_cmd(struct iwl_mvm *mvm,
106 struct ieee80211_vif *vif,
107 struct cfg80211_chan_def *chandef)
108{
109 u32 cmd_id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_CONFIG_CMD);
110 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
111 /*
112 * The command structure is the same for versions 6, 7 and 8 (only the
113 * field interpretation is different), so the same struct can be use
114 * for all cases.
115 */
116 struct iwl_tof_responder_config_cmd_v9 cmd = {
117 .channel_num = chandef->chan->hw_value,
118 .cmd_valid_fields =
119 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_CHAN_INFO |
120 IWL_TOF_RESPONDER_CMD_VALID_BSSID |
121 IWL_TOF_RESPONDER_CMD_VALID_STA_ID),
122 .sta_id = mvmvif->bcast_sta.sta_id,
123 };
124 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id, 6);
125 int err;
126 int cmd_size;
127
128 lockdep_assert_held(&mvm->mutex);
129
130 /* Use a default of bss_color=1 for now */
131 if (cmd_ver == 9) {
132 cmd.cmd_valid_fields |=
133 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_BSS_COLOR |
134 IWL_TOF_RESPONDER_CMD_VALID_MIN_MAX_TIME_BETWEEN_MSR);
135 cmd.bss_color = 1;
136 cmd.min_time_between_msr =
137 cpu_to_le16(IWL_MVM_FTM_NON_TB_MIN_TIME_BETWEEN_MSR);
138 cmd.max_time_between_msr =
139 cpu_to_le16(IWL_MVM_FTM_NON_TB_MAX_TIME_BETWEEN_MSR);
140 cmd_size = sizeof(struct iwl_tof_responder_config_cmd_v9);
141 } else {
142 /* All versions up to version 8 have the same size */
143 cmd_size = sizeof(struct iwl_tof_responder_config_cmd_v8);
144 }
145
146 if (cmd_ver >= 8)
147 iwl_mvm_ftm_responder_set_ndp(mvm, &cmd);
148
149 if (cmd_ver >= 7)
150 err = iwl_mvm_ftm_responder_set_bw_v2(chandef, &cmd.format_bw,
151 &cmd.ctrl_ch_position,
152 cmd_ver);
153 else
154 err = iwl_mvm_ftm_responder_set_bw_v1(chandef, &cmd.format_bw,
155 &cmd.ctrl_ch_position);
156
157 if (err) {
158 IWL_ERR(mvm, "Failed to set responder bandwidth\n");
159 return err;
160 }
161
162 memcpy(cmd.bssid, vif->addr, ETH_ALEN);
163
164 return iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, cmd_size, &cmd);
165}
166
167static int
168iwl_mvm_ftm_responder_dyn_cfg_v2(struct iwl_mvm *mvm,
169 struct ieee80211_vif *vif,
170 struct ieee80211_ftm_responder_params *params)
171{
172 struct iwl_tof_responder_dyn_config_cmd_v2 cmd = {
173 .lci_len = cpu_to_le32(params->lci_len + 2),
174 .civic_len = cpu_to_le32(params->civicloc_len + 2),
175 };
176 u8 data[IWL_LCI_CIVIC_IE_MAX_SIZE] = {0};
177 struct iwl_host_cmd hcmd = {
178 .id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
179 .data[0] = &cmd,
180 .len[0] = sizeof(cmd),
181 .data[1] = &data,
182 /* .len[1] set later */
183 /* may not be able to DMA from stack */
184 .dataflags[1] = IWL_HCMD_DFL_DUP,
185 };
186 u32 aligned_lci_len = ALIGN(params->lci_len + 2, 4);
187 u32 aligned_civicloc_len = ALIGN(params->civicloc_len + 2, 4);
188 u8 *pos = data;
189
190 lockdep_assert_held(&mvm->mutex);
191
192 if (aligned_lci_len + aligned_civicloc_len > sizeof(data)) {
193 IWL_ERR(mvm, "LCI/civicloc data too big (%zd + %zd)\n",
194 params->lci_len, params->civicloc_len);
195 return -ENOBUFS;
196 }
197
198 pos[0] = WLAN_EID_MEASURE_REPORT;
199 pos[1] = params->lci_len;
200 memcpy(pos + 2, params->lci, params->lci_len);
201
202 pos += aligned_lci_len;
203 pos[0] = WLAN_EID_MEASURE_REPORT;
204 pos[1] = params->civicloc_len;
205 memcpy(pos + 2, params->civicloc, params->civicloc_len);
206
207 hcmd.len[1] = aligned_lci_len + aligned_civicloc_len;
208
209 return iwl_mvm_send_cmd(mvm, &hcmd);
210}
211
212static int
213iwl_mvm_ftm_responder_dyn_cfg_v3(struct iwl_mvm *mvm,
214 struct ieee80211_vif *vif,
215 struct ieee80211_ftm_responder_params *params,
216 struct iwl_mvm_pasn_hltk_data *hltk_data)
217{
218 struct iwl_tof_responder_dyn_config_cmd cmd;
219 struct iwl_host_cmd hcmd = {
220 .id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
221 .data[0] = &cmd,
222 .len[0] = sizeof(cmd),
223 /* may not be able to DMA from stack */
224 .dataflags[0] = IWL_HCMD_DFL_DUP,
225 };
226
227 lockdep_assert_held(&mvm->mutex);
228
229 cmd.valid_flags = 0;
230
231 if (params) {
232 if (params->lci_len + 2 > sizeof(cmd.lci_buf) ||
233 params->civicloc_len + 2 > sizeof(cmd.civic_buf)) {
234 IWL_ERR(mvm,
235 "LCI/civic data too big (lci=%zd, civic=%zd)\n",
236 params->lci_len, params->civicloc_len);
237 return -ENOBUFS;
238 }
239
240 cmd.lci_buf[0] = WLAN_EID_MEASURE_REPORT;
241 cmd.lci_buf[1] = params->lci_len;
242 memcpy(cmd.lci_buf + 2, params->lci, params->lci_len);
243 cmd.lci_len = params->lci_len + 2;
244
245 cmd.civic_buf[0] = WLAN_EID_MEASURE_REPORT;
246 cmd.civic_buf[1] = params->civicloc_len;
247 memcpy(cmd.civic_buf + 2, params->civicloc,
248 params->civicloc_len);
249 cmd.civic_len = params->civicloc_len + 2;
250
251 cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_LCI |
252 IWL_RESPONDER_DYN_CFG_VALID_CIVIC;
253 }
254
255 if (hltk_data) {
256 if (hltk_data->cipher > IWL_LOCATION_CIPHER_GCMP_256) {
257 IWL_ERR(mvm, "invalid cipher: %u\n",
258 hltk_data->cipher);
259 return -EINVAL;
260 }
261
262 cmd.cipher = hltk_data->cipher;
263 memcpy(cmd.addr, hltk_data->addr, sizeof(cmd.addr));
264 memcpy(cmd.hltk_buf, hltk_data->hltk, sizeof(cmd.hltk_buf));
265 cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_PASN_STA;
266 }
267
268 return iwl_mvm_send_cmd(mvm, &hcmd);
269}
270
271static int
272iwl_mvm_ftm_responder_dyn_cfg_cmd(struct iwl_mvm *mvm,
273 struct ieee80211_vif *vif,
274 struct ieee80211_ftm_responder_params *params)
275{
276 int ret;
277 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
278 WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
279 2);
280
281 switch (cmd_ver) {
282 case 2:
283 ret = iwl_mvm_ftm_responder_dyn_cfg_v2(mvm, vif,
284 params);
285 break;
286 case 3:
287 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif,
288 params, NULL);
289 break;
290 default:
291 IWL_ERR(mvm, "Unsupported DYN_CONFIG_CMD version %u\n",
292 cmd_ver);
293 ret = -ENOTSUPP;
294 }
295
296 return ret;
297}
298
299static void iwl_mvm_resp_del_pasn_sta(struct iwl_mvm *mvm,
300 struct ieee80211_vif *vif,
301 struct iwl_mvm_pasn_sta *sta)
302{
303 list_del(&sta->list);
304 iwl_mvm_rm_sta_id(mvm, vif, sta->int_sta.sta_id);
305 iwl_mvm_dealloc_int_sta(mvm, &sta->int_sta);
306 kfree(sta);
307}
308
309int iwl_mvm_ftm_respoder_add_pasn_sta(struct iwl_mvm *mvm,
310 struct ieee80211_vif *vif,
311 u8 *addr, u32 cipher, u8 *tk, u32 tk_len,
312 u8 *hltk, u32 hltk_len)
313{
314 int ret;
315 struct iwl_mvm_pasn_sta *sta = NULL;
316 struct iwl_mvm_pasn_hltk_data hltk_data = {
317 .addr = addr,
318 .hltk = hltk,
319 };
320 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
321 WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
322 2);
323
324 lockdep_assert_held(&mvm->mutex);
325
326 if (cmd_ver < 3) {
327 IWL_ERR(mvm, "Adding PASN station not supported by FW\n");
328 return -ENOTSUPP;
329 }
330
331 hltk_data.cipher = iwl_mvm_cipher_to_location_cipher(cipher);
332 if (hltk_data.cipher == IWL_LOCATION_CIPHER_INVALID) {
333 IWL_ERR(mvm, "invalid cipher: %u\n", cipher);
334 return -EINVAL;
335 }
336
337 if (tk && tk_len) {
338 sta = kzalloc(sizeof(*sta), GFP_KERNEL);
339 if (!sta)
340 return -ENOBUFS;
341
342 ret = iwl_mvm_add_pasn_sta(mvm, vif, &sta->int_sta, addr,
343 cipher, tk, tk_len);
344 if (ret) {
345 kfree(sta);
346 return ret;
347 }
348
349 memcpy(sta->addr, addr, ETH_ALEN);
350 list_add_tail(&sta->list, &mvm->resp_pasn_list);
351 }
352
353 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif, NULL, &hltk_data);
354 if (ret && sta)
355 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
356
357 return ret;
358}
359
360int iwl_mvm_ftm_resp_remove_pasn_sta(struct iwl_mvm *mvm,
361 struct ieee80211_vif *vif, u8 *addr)
362{
363 struct iwl_mvm_pasn_sta *sta, *prev;
364
365 lockdep_assert_held(&mvm->mutex);
366
367 list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list) {
368 if (!memcmp(sta->addr, addr, ETH_ALEN)) {
369 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
370 return 0;
371 }
372 }
373
374 IWL_ERR(mvm, "FTM: PASN station %pM not found\n", addr);
375 return -EINVAL;
376}
377
378int iwl_mvm_ftm_start_responder(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
379{
380 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
381 struct ieee80211_ftm_responder_params *params;
382 struct ieee80211_chanctx_conf ctx, *pctx;
383 u16 *phy_ctxt_id;
384 struct iwl_mvm_phy_ctxt *phy_ctxt;
385 int ret;
386
387 params = vif->bss_conf.ftmr_params;
388
389 lockdep_assert_held(&mvm->mutex);
390
391 if (WARN_ON_ONCE(!vif->bss_conf.ftm_responder))
392 return -EINVAL;
393
394 if (vif->p2p || vif->type != NL80211_IFTYPE_AP ||
395 !mvmvif->ap_ibss_active) {
396 IWL_ERR(mvm, "Cannot start responder, not in AP mode\n");
397 return -EIO;
398 }
399
400 rcu_read_lock();
401 pctx = rcu_dereference(vif->bss_conf.chanctx_conf);
402 /* Copy the ctx to unlock the rcu and send the phy ctxt. We don't care
403 * about changes in the ctx after releasing the lock because the driver
404 * is still protected by the mutex. */
405 ctx = *pctx;
406 phy_ctxt_id = (u16 *)pctx->drv_priv;
407 rcu_read_unlock();
408
409 phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
410 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx.def,
411 ctx.rx_chains_static,
412 ctx.rx_chains_dynamic);
413 if (ret)
414 return ret;
415
416 ret = iwl_mvm_ftm_responder_cmd(mvm, vif, &ctx.def);
417 if (ret)
418 return ret;
419
420 if (params)
421 ret = iwl_mvm_ftm_responder_dyn_cfg_cmd(mvm, vif, params);
422
423 return ret;
424}
425
426void iwl_mvm_ftm_responder_clear(struct iwl_mvm *mvm,
427 struct ieee80211_vif *vif)
428{
429 struct iwl_mvm_pasn_sta *sta, *prev;
430
431 lockdep_assert_held(&mvm->mutex);
432
433 list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list)
434 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
435}
436
437void iwl_mvm_ftm_restart_responder(struct iwl_mvm *mvm,
438 struct ieee80211_vif *vif)
439{
440 if (!vif->bss_conf.ftm_responder)
441 return;
442
443 iwl_mvm_ftm_responder_clear(mvm, vif);
444 iwl_mvm_ftm_start_responder(mvm, vif);
445}
446
447void iwl_mvm_ftm_responder_stats(struct iwl_mvm *mvm,
448 struct iwl_rx_cmd_buffer *rxb)
449{
450 struct iwl_rx_packet *pkt = rxb_addr(rxb);
451 struct iwl_ftm_responder_stats *resp = (void *)pkt->data;
452 struct cfg80211_ftm_responder_stats *stats = &mvm->ftm_resp_stats;
453 u32 flags = le32_to_cpu(resp->flags);
454
455 if (resp->success_ftm == resp->ftm_per_burst)
456 stats->success_num++;
457 else if (resp->success_ftm >= 2)
458 stats->partial_num++;
459 else
460 stats->failed_num++;
461
462 if ((flags & FTM_RESP_STAT_ASAP_REQ) &&
463 (flags & FTM_RESP_STAT_ASAP_RESP))
464 stats->asap_num++;
465
466 if (flags & FTM_RESP_STAT_NON_ASAP_RESP)
467 stats->non_asap_num++;
468
469 stats->total_duration_ms += le32_to_cpu(resp->duration) / USEC_PER_MSEC;
470
471 if (flags & FTM_RESP_STAT_TRIGGER_UNKNOWN)
472 stats->unknown_triggers_num++;
473
474 if (flags & FTM_RESP_STAT_DUP)
475 stats->reschedule_requests_num++;
476
477 if (flags & FTM_RESP_STAT_NON_ASAP_OUT_WIN)
478 stats->out_of_window_triggers_num++;
479}