1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2015-2017 Intel Deutschland GmbH
4 * Copyright (C) 2018-2021 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)105 iwl_mvm_ftm_responder_cmd(struct iwl_mvm *mvm,
106 struct ieee80211_vif *vif,
107 struct cfg80211_chan_def *chandef)
108 {
109 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
110 /*
111 * The command structure is the same for versions 6, 7 and 8 (only the
112 * field interpretation is different), so the same struct can be use
113 * for all cases.
114 */
115 struct iwl_tof_responder_config_cmd_v9 cmd = {
116 .channel_num = chandef->chan->hw_value,
117 .cmd_valid_fields =
118 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_CHAN_INFO |
119 IWL_TOF_RESPONDER_CMD_VALID_BSSID |
120 IWL_TOF_RESPONDER_CMD_VALID_STA_ID),
121 .sta_id = mvmvif->bcast_sta.sta_id,
122 };
123 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP,
124 TOF_RESPONDER_CONFIG_CMD, 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, iwl_cmd_id(TOF_RESPONDER_CONFIG_CMD,
165 LOCATION_GROUP, 0),
166 0, cmd_size, &cmd);
167 }
168
169 static int
iwl_mvm_ftm_responder_dyn_cfg_v2(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_ftm_responder_params * params)170 iwl_mvm_ftm_responder_dyn_cfg_v2(struct iwl_mvm *mvm,
171 struct ieee80211_vif *vif,
172 struct ieee80211_ftm_responder_params *params)
173 {
174 struct iwl_tof_responder_dyn_config_cmd_v2 cmd = {
175 .lci_len = cpu_to_le32(params->lci_len + 2),
176 .civic_len = cpu_to_le32(params->civicloc_len + 2),
177 };
178 u8 data[IWL_LCI_CIVIC_IE_MAX_SIZE] = {0};
179 struct iwl_host_cmd hcmd = {
180 .id = iwl_cmd_id(TOF_RESPONDER_DYN_CONFIG_CMD,
181 LOCATION_GROUP, 0),
182 .data[0] = &cmd,
183 .len[0] = sizeof(cmd),
184 .data[1] = &data,
185 /* .len[1] set later */
186 /* may not be able to DMA from stack */
187 .dataflags[1] = IWL_HCMD_DFL_DUP,
188 };
189 u32 aligned_lci_len = ALIGN(params->lci_len + 2, 4);
190 u32 aligned_civicloc_len = ALIGN(params->civicloc_len + 2, 4);
191 u8 *pos = data;
192
193 lockdep_assert_held(&mvm->mutex);
194
195 if (aligned_lci_len + aligned_civicloc_len > sizeof(data)) {
196 IWL_ERR(mvm, "LCI/civicloc data too big (%zd + %zd)\n",
197 params->lci_len, params->civicloc_len);
198 return -ENOBUFS;
199 }
200
201 pos[0] = WLAN_EID_MEASURE_REPORT;
202 pos[1] = params->lci_len;
203 memcpy(pos + 2, params->lci, params->lci_len);
204
205 pos += aligned_lci_len;
206 pos[0] = WLAN_EID_MEASURE_REPORT;
207 pos[1] = params->civicloc_len;
208 memcpy(pos + 2, params->civicloc, params->civicloc_len);
209
210 hcmd.len[1] = aligned_lci_len + aligned_civicloc_len;
211
212 return iwl_mvm_send_cmd(mvm, &hcmd);
213 }
214
215 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)216 iwl_mvm_ftm_responder_dyn_cfg_v3(struct iwl_mvm *mvm,
217 struct ieee80211_vif *vif,
218 struct ieee80211_ftm_responder_params *params,
219 struct iwl_mvm_pasn_hltk_data *hltk_data)
220 {
221 struct iwl_tof_responder_dyn_config_cmd cmd;
222 struct iwl_host_cmd hcmd = {
223 .id = iwl_cmd_id(TOF_RESPONDER_DYN_CONFIG_CMD,
224 LOCATION_GROUP, 0),
225 .data[0] = &cmd,
226 .len[0] = sizeof(cmd),
227 /* may not be able to DMA from stack */
228 .dataflags[0] = IWL_HCMD_DFL_DUP,
229 };
230
231 lockdep_assert_held(&mvm->mutex);
232
233 cmd.valid_flags = 0;
234
235 if (params) {
236 if (params->lci_len + 2 > sizeof(cmd.lci_buf) ||
237 params->civicloc_len + 2 > sizeof(cmd.civic_buf)) {
238 IWL_ERR(mvm,
239 "LCI/civic data too big (lci=%zd, civic=%zd)\n",
240 params->lci_len, params->civicloc_len);
241 return -ENOBUFS;
242 }
243
244 cmd.lci_buf[0] = WLAN_EID_MEASURE_REPORT;
245 cmd.lci_buf[1] = params->lci_len;
246 memcpy(cmd.lci_buf + 2, params->lci, params->lci_len);
247 cmd.lci_len = params->lci_len + 2;
248
249 cmd.civic_buf[0] = WLAN_EID_MEASURE_REPORT;
250 cmd.civic_buf[1] = params->civicloc_len;
251 memcpy(cmd.civic_buf + 2, params->civicloc,
252 params->civicloc_len);
253 cmd.civic_len = params->civicloc_len + 2;
254
255 cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_LCI |
256 IWL_RESPONDER_DYN_CFG_VALID_CIVIC;
257 }
258
259 if (hltk_data) {
260 if (hltk_data->cipher > IWL_LOCATION_CIPHER_GCMP_256) {
261 IWL_ERR(mvm, "invalid cipher: %u\n",
262 hltk_data->cipher);
263 return -EINVAL;
264 }
265
266 cmd.cipher = hltk_data->cipher;
267 memcpy(cmd.addr, hltk_data->addr, sizeof(cmd.addr));
268 memcpy(cmd.hltk_buf, hltk_data->hltk, sizeof(cmd.hltk_buf));
269 cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_PASN_STA;
270 }
271
272 return iwl_mvm_send_cmd(mvm, &hcmd);
273 }
274
275 static int
iwl_mvm_ftm_responder_dyn_cfg_cmd(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_ftm_responder_params * params)276 iwl_mvm_ftm_responder_dyn_cfg_cmd(struct iwl_mvm *mvm,
277 struct ieee80211_vif *vif,
278 struct ieee80211_ftm_responder_params *params)
279 {
280 int ret;
281 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP,
282 TOF_RESPONDER_DYN_CONFIG_CMD, 2);
283
284 switch (cmd_ver) {
285 case 2:
286 ret = iwl_mvm_ftm_responder_dyn_cfg_v2(mvm, vif,
287 params);
288 break;
289 case 3:
290 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif,
291 params, NULL);
292 break;
293 default:
294 IWL_ERR(mvm, "Unsupported DYN_CONFIG_CMD version %u\n",
295 cmd_ver);
296 ret = -ENOTSUPP;
297 }
298
299 return ret;
300 }
301
iwl_mvm_resp_del_pasn_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_pasn_sta * sta)302 static void iwl_mvm_resp_del_pasn_sta(struct iwl_mvm *mvm,
303 struct ieee80211_vif *vif,
304 struct iwl_mvm_pasn_sta *sta)
305 {
306 list_del(&sta->list);
307 iwl_mvm_rm_sta_id(mvm, vif, sta->int_sta.sta_id);
308 iwl_mvm_dealloc_int_sta(mvm, &sta->int_sta);
309 kfree(sta);
310 }
311
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)312 int iwl_mvm_ftm_respoder_add_pasn_sta(struct iwl_mvm *mvm,
313 struct ieee80211_vif *vif,
314 u8 *addr, u32 cipher, u8 *tk, u32 tk_len,
315 u8 *hltk, u32 hltk_len)
316 {
317 int ret;
318 struct iwl_mvm_pasn_sta *sta = NULL;
319 struct iwl_mvm_pasn_hltk_data hltk_data = {
320 .addr = addr,
321 .hltk = hltk,
322 };
323 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP,
324 TOF_RESPONDER_DYN_CONFIG_CMD, 2);
325
326 lockdep_assert_held(&mvm->mutex);
327
328 if (cmd_ver < 3) {
329 IWL_ERR(mvm, "Adding PASN station not supported by FW\n");
330 return -ENOTSUPP;
331 }
332
333 hltk_data.cipher = iwl_mvm_cipher_to_location_cipher(cipher);
334 if (hltk_data.cipher == IWL_LOCATION_CIPHER_INVALID) {
335 IWL_ERR(mvm, "invalid cipher: %u\n", cipher);
336 return -EINVAL;
337 }
338
339 if (tk && tk_len) {
340 sta = kzalloc(sizeof(*sta), GFP_KERNEL);
341 if (!sta)
342 return -ENOBUFS;
343
344 ret = iwl_mvm_add_pasn_sta(mvm, vif, &sta->int_sta, addr,
345 cipher, tk, tk_len);
346 if (ret) {
347 kfree(sta);
348 return ret;
349 }
350
351 memcpy(sta->addr, addr, ETH_ALEN);
352 list_add_tail(&sta->list, &mvm->resp_pasn_list);
353 }
354
355 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif, NULL, &hltk_data);
356 if (ret && sta)
357 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
358
359 return ret;
360 }
361
iwl_mvm_ftm_resp_remove_pasn_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 * addr)362 int iwl_mvm_ftm_resp_remove_pasn_sta(struct iwl_mvm *mvm,
363 struct ieee80211_vif *vif, u8 *addr)
364 {
365 struct iwl_mvm_pasn_sta *sta, *prev;
366
367 lockdep_assert_held(&mvm->mutex);
368
369 list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list) {
370 if (!memcmp(sta->addr, addr, ETH_ALEN)) {
371 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
372 return 0;
373 }
374 }
375
376 IWL_ERR(mvm, "FTM: PASN station %pM not found\n", addr);
377 return -EINVAL;
378 }
379
iwl_mvm_ftm_start_responder(struct iwl_mvm * mvm,struct ieee80211_vif * vif)380 int iwl_mvm_ftm_start_responder(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
381 {
382 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
383 struct ieee80211_ftm_responder_params *params;
384 struct ieee80211_chanctx_conf ctx, *pctx;
385 u16 *phy_ctxt_id;
386 struct iwl_mvm_phy_ctxt *phy_ctxt;
387 int ret;
388
389 params = vif->bss_conf.ftmr_params;
390
391 lockdep_assert_held(&mvm->mutex);
392
393 if (WARN_ON_ONCE(!vif->bss_conf.ftm_responder))
394 return -EINVAL;
395
396 if (vif->p2p || vif->type != NL80211_IFTYPE_AP ||
397 !mvmvif->ap_ibss_active) {
398 IWL_ERR(mvm, "Cannot start responder, not in AP mode\n");
399 return -EIO;
400 }
401
402 rcu_read_lock();
403 pctx = rcu_dereference(vif->chanctx_conf);
404 /* Copy the ctx to unlock the rcu and send the phy ctxt. We don't care
405 * about changes in the ctx after releasing the lock because the driver
406 * is still protected by the mutex. */
407 ctx = *pctx;
408 phy_ctxt_id = (u16 *)pctx->drv_priv;
409 rcu_read_unlock();
410
411 phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
412 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx.def,
413 ctx.rx_chains_static,
414 ctx.rx_chains_dynamic);
415 if (ret)
416 return ret;
417
418 ret = iwl_mvm_ftm_responder_cmd(mvm, vif, &ctx.def);
419 if (ret)
420 return ret;
421
422 if (params)
423 ret = iwl_mvm_ftm_responder_dyn_cfg_cmd(mvm, vif, params);
424
425 return ret;
426 }
427
iwl_mvm_ftm_responder_clear(struct iwl_mvm * mvm,struct ieee80211_vif * vif)428 void iwl_mvm_ftm_responder_clear(struct iwl_mvm *mvm,
429 struct ieee80211_vif *vif)
430 {
431 struct iwl_mvm_pasn_sta *sta, *prev;
432
433 lockdep_assert_held(&mvm->mutex);
434
435 list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list)
436 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
437 }
438
iwl_mvm_ftm_restart_responder(struct iwl_mvm * mvm,struct ieee80211_vif * vif)439 void iwl_mvm_ftm_restart_responder(struct iwl_mvm *mvm,
440 struct ieee80211_vif *vif)
441 {
442 if (!vif->bss_conf.ftm_responder)
443 return;
444
445 iwl_mvm_ftm_responder_clear(mvm, vif);
446 iwl_mvm_ftm_start_responder(mvm, vif);
447 }
448
iwl_mvm_ftm_responder_stats(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)449 void iwl_mvm_ftm_responder_stats(struct iwl_mvm *mvm,
450 struct iwl_rx_cmd_buffer *rxb)
451 {
452 struct iwl_rx_packet *pkt = rxb_addr(rxb);
453 struct iwl_ftm_responder_stats *resp = (void *)pkt->data;
454 struct cfg80211_ftm_responder_stats *stats = &mvm->ftm_resp_stats;
455 u32 flags = le32_to_cpu(resp->flags);
456
457 if (resp->success_ftm == resp->ftm_per_burst)
458 stats->success_num++;
459 else if (resp->success_ftm >= 2)
460 stats->partial_num++;
461 else
462 stats->failed_num++;
463
464 if ((flags & FTM_RESP_STAT_ASAP_REQ) &&
465 (flags & FTM_RESP_STAT_ASAP_RESP))
466 stats->asap_num++;
467
468 if (flags & FTM_RESP_STAT_NON_ASAP_RESP)
469 stats->non_asap_num++;
470
471 stats->total_duration_ms += le32_to_cpu(resp->duration) / USEC_PER_MSEC;
472
473 if (flags & FTM_RESP_STAT_TRIGGER_UNKNOWN)
474 stats->unknown_triggers_num++;
475
476 if (flags & FTM_RESP_STAT_DUP)
477 stats->reschedule_requests_num++;
478
479 if (flags & FTM_RESP_STAT_NON_ASAP_OUT_WIN)
480 stats->out_of_window_triggers_num++;
481 }
482