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
11 struct iwl_mvm_pasn_sta {
12 struct list_head list;
13 struct iwl_mvm_int_sta int_sta;
14 u8 addr[ETH_ALEN];
15 };
16
17 struct iwl_mvm_pasn_hltk_data {
18 u8 *addr;
19 u8 cipher;
20 u8 *hltk;
21 };
22
iwl_mvm_ftm_responder_set_bw_v1(struct cfg80211_chan_def * chandef,u8 * bw,u8 * ctrl_ch_position)23 static 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
iwl_mvm_ftm_responder_set_bw_v2(struct cfg80211_chan_def * chandef,u8 * format_bw,u8 * ctrl_ch_position,u8 cmd_ver)48 static 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
86 static void
iwl_mvm_ftm_responder_set_ndp(struct iwl_mvm * mvm,struct iwl_tof_responder_config_cmd_v9 * cmd)87 iwl_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
104 static int
iwl_mvm_ftm_responder_cmd(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_chan_def * chandef,struct ieee80211_bss_conf * link_conf)105 iwl_mvm_ftm_responder_cmd(struct iwl_mvm *mvm,
106 struct ieee80211_vif *vif,
107 struct cfg80211_chan_def *chandef,
108 struct ieee80211_bss_conf *link_conf)
109 {
110 u32 cmd_id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_CONFIG_CMD);
111 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
112 /*
113 * The command structure is the same for versions 6, 7 and 8 (only the
114 * field interpretation is different), so the same struct can be use
115 * for all cases.
116 */
117 struct iwl_tof_responder_config_cmd_v9 cmd = {
118 .channel_num = chandef->chan->hw_value,
119 .cmd_valid_fields =
120 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_CHAN_INFO |
121 IWL_TOF_RESPONDER_CMD_VALID_BSSID |
122 IWL_TOF_RESPONDER_CMD_VALID_STA_ID),
123 .sta_id = mvmvif->link[link_conf->link_id]->bcast_sta.sta_id,
124 };
125 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id, 6);
126 int err;
127 int cmd_size;
128
129 lockdep_assert_held(&mvm->mutex);
130
131 /* Use a default of bss_color=1 for now */
132 if (cmd_ver == 9) {
133 cmd.cmd_valid_fields |=
134 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_BSS_COLOR |
135 IWL_TOF_RESPONDER_CMD_VALID_MIN_MAX_TIME_BETWEEN_MSR);
136 cmd.bss_color = 1;
137 cmd.min_time_between_msr =
138 cpu_to_le16(IWL_MVM_FTM_NON_TB_MIN_TIME_BETWEEN_MSR);
139 cmd.max_time_between_msr =
140 cpu_to_le16(IWL_MVM_FTM_NON_TB_MAX_TIME_BETWEEN_MSR);
141 cmd_size = sizeof(struct iwl_tof_responder_config_cmd_v9);
142 } else {
143 /* All versions up to version 8 have the same size */
144 cmd_size = sizeof(struct iwl_tof_responder_config_cmd_v8);
145 }
146
147 if (cmd_ver >= 8)
148 iwl_mvm_ftm_responder_set_ndp(mvm, &cmd);
149
150 if (cmd_ver >= 7)
151 err = iwl_mvm_ftm_responder_set_bw_v2(chandef, &cmd.format_bw,
152 &cmd.ctrl_ch_position,
153 cmd_ver);
154 else
155 err = iwl_mvm_ftm_responder_set_bw_v1(chandef, &cmd.format_bw,
156 &cmd.ctrl_ch_position);
157
158 if (err) {
159 IWL_ERR(mvm, "Failed to set responder bandwidth\n");
160 return err;
161 }
162
163 memcpy(cmd.bssid, vif->addr, ETH_ALEN);
164
165 return iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, cmd_size, &cmd);
166 }
167
168 static int
iwl_mvm_ftm_responder_dyn_cfg_v2(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_ftm_responder_params * params)169 iwl_mvm_ftm_responder_dyn_cfg_v2(struct iwl_mvm *mvm,
170 struct ieee80211_vif *vif,
171 struct ieee80211_ftm_responder_params *params)
172 {
173 struct iwl_tof_responder_dyn_config_cmd_v2 cmd = {
174 .lci_len = cpu_to_le32(params->lci_len + 2),
175 .civic_len = cpu_to_le32(params->civicloc_len + 2),
176 };
177 u8 data[IWL_LCI_CIVIC_IE_MAX_SIZE] = {0};
178 struct iwl_host_cmd hcmd = {
179 .id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
180 .data[0] = &cmd,
181 .len[0] = sizeof(cmd),
182 .data[1] = &data,
183 /* .len[1] set later */
184 /* may not be able to DMA from stack */
185 .dataflags[1] = IWL_HCMD_DFL_DUP,
186 };
187 u32 aligned_lci_len = ALIGN(params->lci_len + 2, 4);
188 u32 aligned_civicloc_len = ALIGN(params->civicloc_len + 2, 4);
189 u8 *pos = data;
190
191 lockdep_assert_held(&mvm->mutex);
192
193 if (aligned_lci_len + aligned_civicloc_len > sizeof(data)) {
194 IWL_ERR(mvm, "LCI/civicloc data too big (%zd + %zd)\n",
195 params->lci_len, params->civicloc_len);
196 return -ENOBUFS;
197 }
198
199 pos[0] = WLAN_EID_MEASURE_REPORT;
200 pos[1] = params->lci_len;
201 memcpy(pos + 2, params->lci, params->lci_len);
202
203 pos += aligned_lci_len;
204 pos[0] = WLAN_EID_MEASURE_REPORT;
205 pos[1] = params->civicloc_len;
206 memcpy(pos + 2, params->civicloc, params->civicloc_len);
207
208 hcmd.len[1] = aligned_lci_len + aligned_civicloc_len;
209
210 return iwl_mvm_send_cmd(mvm, &hcmd);
211 }
212
213 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)214 iwl_mvm_ftm_responder_dyn_cfg_v3(struct iwl_mvm *mvm,
215 struct ieee80211_vif *vif,
216 struct ieee80211_ftm_responder_params *params,
217 struct iwl_mvm_pasn_hltk_data *hltk_data)
218 {
219 struct iwl_tof_responder_dyn_config_cmd cmd;
220 struct iwl_host_cmd hcmd = {
221 .id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
222 .data[0] = &cmd,
223 .len[0] = sizeof(cmd),
224 /* may not be able to DMA from stack */
225 .dataflags[0] = IWL_HCMD_DFL_DUP,
226 };
227
228 lockdep_assert_held(&mvm->mutex);
229
230 cmd.valid_flags = 0;
231
232 if (params) {
233 if (params->lci_len + 2 > sizeof(cmd.lci_buf) ||
234 params->civicloc_len + 2 > sizeof(cmd.civic_buf)) {
235 IWL_ERR(mvm,
236 "LCI/civic data too big (lci=%zd, civic=%zd)\n",
237 params->lci_len, params->civicloc_len);
238 return -ENOBUFS;
239 }
240
241 cmd.lci_buf[0] = WLAN_EID_MEASURE_REPORT;
242 cmd.lci_buf[1] = params->lci_len;
243 memcpy(cmd.lci_buf + 2, params->lci, params->lci_len);
244 cmd.lci_len = params->lci_len + 2;
245
246 cmd.civic_buf[0] = WLAN_EID_MEASURE_REPORT;
247 cmd.civic_buf[1] = params->civicloc_len;
248 memcpy(cmd.civic_buf + 2, params->civicloc,
249 params->civicloc_len);
250 cmd.civic_len = params->civicloc_len + 2;
251
252 cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_LCI |
253 IWL_RESPONDER_DYN_CFG_VALID_CIVIC;
254 }
255
256 if (hltk_data) {
257 if (hltk_data->cipher > IWL_LOCATION_CIPHER_GCMP_256) {
258 IWL_ERR(mvm, "invalid cipher: %u\n",
259 hltk_data->cipher);
260 return -EINVAL;
261 }
262
263 cmd.cipher = hltk_data->cipher;
264 memcpy(cmd.addr, hltk_data->addr, sizeof(cmd.addr));
265 memcpy(cmd.hltk_buf, hltk_data->hltk, sizeof(cmd.hltk_buf));
266 cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_PASN_STA;
267 }
268
269 return iwl_mvm_send_cmd(mvm, &hcmd);
270 }
271
272 static int
iwl_mvm_ftm_responder_dyn_cfg_cmd(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_ftm_responder_params * params)273 iwl_mvm_ftm_responder_dyn_cfg_cmd(struct iwl_mvm *mvm,
274 struct ieee80211_vif *vif,
275 struct ieee80211_ftm_responder_params *params)
276 {
277 int ret;
278 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
279 WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
280 2);
281
282 switch (cmd_ver) {
283 case 2:
284 ret = iwl_mvm_ftm_responder_dyn_cfg_v2(mvm, vif,
285 params);
286 break;
287 case 3:
288 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif,
289 params, NULL);
290 break;
291 default:
292 IWL_ERR(mvm, "Unsupported DYN_CONFIG_CMD version %u\n",
293 cmd_ver);
294 ret = -ENOTSUPP;
295 }
296
297 return ret;
298 }
299
iwl_mvm_resp_del_pasn_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_pasn_sta * sta)300 static void iwl_mvm_resp_del_pasn_sta(struct iwl_mvm *mvm,
301 struct ieee80211_vif *vif,
302 struct iwl_mvm_pasn_sta *sta)
303 {
304 list_del(&sta->list);
305 iwl_mvm_rm_sta_id(mvm, vif, sta->int_sta.sta_id);
306 iwl_mvm_dealloc_int_sta(mvm, &sta->int_sta);
307 kfree(sta);
308 }
309
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)310 int iwl_mvm_ftm_respoder_add_pasn_sta(struct iwl_mvm *mvm,
311 struct ieee80211_vif *vif,
312 u8 *addr, u32 cipher, u8 *tk, u32 tk_len,
313 u8 *hltk, u32 hltk_len)
314 {
315 int ret;
316 struct iwl_mvm_pasn_sta *sta = NULL;
317 struct iwl_mvm_pasn_hltk_data hltk_data = {
318 .addr = addr,
319 .hltk = hltk,
320 };
321 struct iwl_mvm_pasn_hltk_data *hltk_data_ptr = NULL;
322
323 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
324 WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
325 2);
326
327 lockdep_assert_held(&mvm->mutex);
328
329 if (cmd_ver < 3) {
330 IWL_ERR(mvm, "Adding PASN station not supported by FW\n");
331 return -ENOTSUPP;
332 }
333
334 if ((!hltk || !hltk_len) && (!tk || !tk_len)) {
335 IWL_ERR(mvm, "TK and HLTK not set\n");
336 return -EINVAL;
337 }
338
339 if (hltk && hltk_len) {
340 hltk_data.cipher = iwl_mvm_cipher_to_location_cipher(cipher);
341 if (hltk_data.cipher == IWL_LOCATION_CIPHER_INVALID) {
342 IWL_ERR(mvm, "invalid cipher: %u\n", cipher);
343 return -EINVAL;
344 }
345
346 hltk_data_ptr = &hltk_data;
347 }
348
349 if (tk && tk_len) {
350 sta = kzalloc(sizeof(*sta), GFP_KERNEL);
351 if (!sta)
352 return -ENOBUFS;
353
354 ret = iwl_mvm_add_pasn_sta(mvm, vif, &sta->int_sta, addr,
355 cipher, tk, tk_len);
356 if (ret) {
357 kfree(sta);
358 return ret;
359 }
360
361 memcpy(sta->addr, addr, ETH_ALEN);
362 list_add_tail(&sta->list, &mvm->resp_pasn_list);
363 }
364
365 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif, NULL, hltk_data_ptr);
366 if (ret && sta)
367 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
368
369 return ret;
370 }
371
iwl_mvm_ftm_resp_remove_pasn_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 * addr)372 int iwl_mvm_ftm_resp_remove_pasn_sta(struct iwl_mvm *mvm,
373 struct ieee80211_vif *vif, u8 *addr)
374 {
375 struct iwl_mvm_pasn_sta *sta, *prev;
376
377 lockdep_assert_held(&mvm->mutex);
378
379 list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list) {
380 if (!memcmp(sta->addr, addr, ETH_ALEN)) {
381 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
382 return 0;
383 }
384 }
385
386 IWL_ERR(mvm, "FTM: PASN station %pM not found\n", addr);
387 return -EINVAL;
388 }
389
iwl_mvm_ftm_start_responder(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf)390 int iwl_mvm_ftm_start_responder(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
391 struct ieee80211_bss_conf *bss_conf)
392 {
393 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
394 struct ieee80211_ftm_responder_params *params;
395 struct ieee80211_chanctx_conf ctx, *pctx;
396 u16 *phy_ctxt_id;
397 struct iwl_mvm_phy_ctxt *phy_ctxt;
398 int ret;
399
400 params = bss_conf->ftmr_params;
401
402 lockdep_assert_held(&mvm->mutex);
403
404 if (WARN_ON_ONCE(!bss_conf->ftm_responder))
405 return -EINVAL;
406
407 if (vif->p2p || vif->type != NL80211_IFTYPE_AP ||
408 !mvmvif->ap_ibss_active) {
409 IWL_ERR(mvm, "Cannot start responder, not in AP mode\n");
410 return -EIO;
411 }
412
413 rcu_read_lock();
414 pctx = rcu_dereference(bss_conf->chanctx_conf);
415 /* Copy the ctx to unlock the rcu and send the phy ctxt. We don't care
416 * about changes in the ctx after releasing the lock because the driver
417 * is still protected by the mutex. */
418 ctx = *pctx;
419 phy_ctxt_id = (u16 *)pctx->drv_priv;
420 rcu_read_unlock();
421
422 phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
423 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx.def,
424 ctx.rx_chains_static,
425 ctx.rx_chains_dynamic);
426 if (ret)
427 return ret;
428
429 ret = iwl_mvm_ftm_responder_cmd(mvm, vif, &ctx.def, bss_conf);
430 if (ret)
431 return ret;
432
433 if (params)
434 ret = iwl_mvm_ftm_responder_dyn_cfg_cmd(mvm, vif, params);
435
436 return ret;
437 }
438
iwl_mvm_ftm_responder_clear(struct iwl_mvm * mvm,struct ieee80211_vif * vif)439 void iwl_mvm_ftm_responder_clear(struct iwl_mvm *mvm,
440 struct ieee80211_vif *vif)
441 {
442 struct iwl_mvm_pasn_sta *sta, *prev;
443
444 lockdep_assert_held(&mvm->mutex);
445
446 list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list)
447 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
448 }
449
iwl_mvm_ftm_restart_responder(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf)450 void iwl_mvm_ftm_restart_responder(struct iwl_mvm *mvm,
451 struct ieee80211_vif *vif,
452 struct ieee80211_bss_conf *bss_conf)
453 {
454 if (!bss_conf->ftm_responder)
455 return;
456
457 iwl_mvm_ftm_responder_clear(mvm, vif);
458 iwl_mvm_ftm_start_responder(mvm, vif, bss_conf);
459 }
460
iwl_mvm_ftm_responder_stats(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)461 void iwl_mvm_ftm_responder_stats(struct iwl_mvm *mvm,
462 struct iwl_rx_cmd_buffer *rxb)
463 {
464 struct iwl_rx_packet *pkt = rxb_addr(rxb);
465 struct iwl_ftm_responder_stats *resp = (void *)pkt->data;
466 struct cfg80211_ftm_responder_stats *stats = &mvm->ftm_resp_stats;
467 u32 flags = le32_to_cpu(resp->flags);
468
469 if (resp->success_ftm == resp->ftm_per_burst)
470 stats->success_num++;
471 else if (resp->success_ftm >= 2)
472 stats->partial_num++;
473 else
474 stats->failed_num++;
475
476 if ((flags & FTM_RESP_STAT_ASAP_REQ) &&
477 (flags & FTM_RESP_STAT_ASAP_RESP))
478 stats->asap_num++;
479
480 if (flags & FTM_RESP_STAT_NON_ASAP_RESP)
481 stats->non_asap_num++;
482
483 stats->total_duration_ms += le32_to_cpu(resp->duration) / USEC_PER_MSEC;
484
485 if (flags & FTM_RESP_STAT_TRIGGER_UNKNOWN)
486 stats->unknown_triggers_num++;
487
488 if (flags & FTM_RESP_STAT_DUP)
489 stats->reschedule_requests_num++;
490
491 if (flags & FTM_RESP_STAT_NON_ASAP_OUT_WIN)
492 stats->out_of_window_triggers_num++;
493 }
494
