1 /* 2 * Common hostapd/wpa_supplicant HW features 3 * Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi> 4 * Copyright (c) 2015, Qualcomm Atheros, Inc. 5 * 6 * This software may be distributed under the terms of the BSD license. 7 * See README for more details. 8 */ 9 10 #include "includes.h" 11 12 #include "common.h" 13 #include "defs.h" 14 #include "ieee802_11_defs.h" 15 #include "ieee802_11_common.h" 16 #include "hw_features_common.h" 17 18 19 struct hostapd_channel_data * hw_get_channel_chan(struct hostapd_hw_modes *mode, 20 int chan, int *freq) 21 { 22 int i; 23 24 if (freq) 25 *freq = 0; 26 27 if (!mode) 28 return NULL; 29 30 for (i = 0; i < mode->num_channels; i++) { 31 struct hostapd_channel_data *ch = &mode->channels[i]; 32 if (ch->chan == chan) { 33 if (freq) 34 *freq = ch->freq; 35 return ch; 36 } 37 } 38 39 return NULL; 40 } 41 42 43 struct hostapd_channel_data * 44 hw_mode_get_channel(struct hostapd_hw_modes *mode, int freq, int *chan) 45 { 46 int i; 47 48 for (i = 0; i < mode->num_channels; i++) { 49 struct hostapd_channel_data *ch = &mode->channels[i]; 50 51 if (ch->freq == freq) { 52 if (chan) 53 *chan = ch->chan; 54 return ch; 55 } 56 } 57 58 return NULL; 59 } 60 61 62 struct hostapd_channel_data * 63 hw_get_channel_freq(enum hostapd_hw_mode mode, int freq, int *chan, 64 struct hostapd_hw_modes *hw_features, int num_hw_features) 65 { 66 struct hostapd_channel_data *chan_data; 67 int i; 68 69 if (chan) 70 *chan = 0; 71 72 if (!hw_features) 73 return NULL; 74 75 for (i = 0; i < num_hw_features; i++) { 76 struct hostapd_hw_modes *curr_mode = &hw_features[i]; 77 78 if (curr_mode->mode != mode) 79 continue; 80 81 chan_data = hw_mode_get_channel(curr_mode, freq, chan); 82 if (chan_data) 83 return chan_data; 84 } 85 86 return NULL; 87 } 88 89 90 int hw_get_freq(struct hostapd_hw_modes *mode, int chan) 91 { 92 int freq; 93 94 hw_get_channel_chan(mode, chan, &freq); 95 96 return freq; 97 } 98 99 100 int hw_get_chan(enum hostapd_hw_mode mode, int freq, 101 struct hostapd_hw_modes *hw_features, int num_hw_features) 102 { 103 int chan; 104 105 hw_get_channel_freq(mode, freq, &chan, hw_features, num_hw_features); 106 107 return chan; 108 } 109 110 111 int allowed_ht40_channel_pair(enum hostapd_hw_mode mode, 112 struct hostapd_channel_data *p_chan, 113 struct hostapd_channel_data *s_chan) 114 { 115 int ok, first; 116 int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 140, 117 149, 157, 165, 173, 184, 192 }; 118 size_t k; 119 int ht40_plus, pri_chan, sec_chan; 120 121 if (!p_chan || !s_chan) 122 return 0; 123 pri_chan = p_chan->chan; 124 sec_chan = s_chan->chan; 125 126 ht40_plus = pri_chan < sec_chan; 127 128 if (pri_chan == sec_chan || !sec_chan) { 129 if (chan_pri_allowed(p_chan)) 130 return 1; /* HT40 not used */ 131 132 wpa_printf(MSG_ERROR, "Channel %d is not allowed as primary", 133 pri_chan); 134 return 0; 135 } 136 137 wpa_printf(MSG_DEBUG, 138 "HT40: control channel: %d (%d MHz), secondary channel: %d (%d MHz)", 139 pri_chan, p_chan->freq, sec_chan, s_chan->freq); 140 141 /* Verify that HT40 secondary channel is an allowed 20 MHz 142 * channel */ 143 if ((s_chan->flag & HOSTAPD_CHAN_DISABLED) || 144 (ht40_plus && !(p_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P)) || 145 (!ht40_plus && !(p_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40M))) { 146 wpa_printf(MSG_ERROR, "HT40 secondary channel %d not allowed", 147 sec_chan); 148 return 0; 149 } 150 151 /* 152 * Verify that HT40 primary,secondary channel pair is allowed per 153 * IEEE 802.11n Annex J. This is only needed for 5 GHz band since 154 * 2.4 GHz rules allow all cases where the secondary channel fits into 155 * the list of allowed channels (already checked above). 156 */ 157 if (mode != HOSTAPD_MODE_IEEE80211A) 158 return 1; 159 160 first = pri_chan < sec_chan ? pri_chan : sec_chan; 161 162 ok = 0; 163 for (k = 0; k < ARRAY_SIZE(allowed); k++) { 164 if (first == allowed[k]) { 165 ok = 1; 166 break; 167 } 168 } 169 if (!ok) { 170 wpa_printf(MSG_ERROR, "HT40 channel pair (%d, %d) not allowed", 171 pri_chan, sec_chan); 172 return 0; 173 } 174 175 return 1; 176 } 177 178 179 void get_pri_sec_chan(struct wpa_scan_res *bss, int *pri_chan, int *sec_chan) 180 { 181 struct ieee80211_ht_operation *oper; 182 struct ieee802_11_elems elems; 183 184 *pri_chan = *sec_chan = 0; 185 186 ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0); 187 if (elems.ht_operation) { 188 oper = (struct ieee80211_ht_operation *) elems.ht_operation; 189 *pri_chan = oper->primary_chan; 190 if (oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) { 191 int sec = oper->ht_param & 192 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; 193 if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) 194 *sec_chan = *pri_chan + 4; 195 else if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) 196 *sec_chan = *pri_chan - 4; 197 } 198 } 199 } 200 201 202 int check_40mhz_5g(struct wpa_scan_results *scan_res, 203 struct hostapd_channel_data *pri_chan, 204 struct hostapd_channel_data *sec_chan) 205 { 206 int pri_bss, sec_bss; 207 int bss_pri_chan, bss_sec_chan; 208 size_t i; 209 int match; 210 211 if (!scan_res || !pri_chan || !sec_chan || 212 pri_chan->freq == sec_chan->freq) 213 return 0; 214 215 /* 216 * Switch PRI/SEC channels if Beacons were detected on selected SEC 217 * channel, but not on selected PRI channel. 218 */ 219 pri_bss = sec_bss = 0; 220 for (i = 0; i < scan_res->num; i++) { 221 struct wpa_scan_res *bss = scan_res->res[i]; 222 if (bss->freq == pri_chan->freq) 223 pri_bss++; 224 else if (bss->freq == sec_chan->freq) 225 sec_bss++; 226 } 227 if (sec_bss && !pri_bss) { 228 wpa_printf(MSG_INFO, 229 "Switch own primary and secondary channel to get secondary channel with no Beacons from other BSSes"); 230 return 2; 231 } 232 233 /* 234 * Match PRI/SEC channel with any existing HT40 BSS on the same 235 * channels that we are about to use (if already mixed order in 236 * existing BSSes, use own preference). 237 */ 238 match = 0; 239 for (i = 0; i < scan_res->num; i++) { 240 struct wpa_scan_res *bss = scan_res->res[i]; 241 get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan); 242 if (pri_chan->chan == bss_pri_chan && 243 sec_chan->chan == bss_sec_chan) { 244 match = 1; 245 break; 246 } 247 } 248 if (!match) { 249 for (i = 0; i < scan_res->num; i++) { 250 struct wpa_scan_res *bss = scan_res->res[i]; 251 get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan); 252 if (pri_chan->chan == bss_sec_chan && 253 sec_chan->chan == bss_pri_chan) { 254 wpa_printf(MSG_INFO, "Switch own primary and " 255 "secondary channel due to BSS " 256 "overlap with " MACSTR, 257 MAC2STR(bss->bssid)); 258 return 2; 259 } 260 } 261 } 262 263 return 1; 264 } 265 266 267 static int check_20mhz_bss(struct wpa_scan_res *bss, int pri_freq, int start, 268 int end) 269 { 270 struct ieee802_11_elems elems; 271 struct ieee80211_ht_operation *oper; 272 273 if (bss->freq < start || bss->freq > end || bss->freq == pri_freq) 274 return 0; 275 276 ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0); 277 if (!elems.ht_capabilities) { 278 wpa_printf(MSG_DEBUG, "Found overlapping legacy BSS: " 279 MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq); 280 return 1; 281 } 282 283 if (elems.ht_operation) { 284 oper = (struct ieee80211_ht_operation *) elems.ht_operation; 285 if (oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK) 286 return 0; 287 288 wpa_printf(MSG_DEBUG, "Found overlapping 20 MHz HT BSS: " 289 MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq); 290 return 1; 291 } 292 return 0; 293 } 294 295 296 int check_40mhz_2g4(struct hostapd_hw_modes *mode, 297 struct wpa_scan_results *scan_res, int pri_chan, 298 int sec_chan) 299 { 300 int pri_freq, sec_freq; 301 int affected_start, affected_end; 302 size_t i; 303 304 if (!mode || !scan_res || !pri_chan || !sec_chan || 305 pri_chan == sec_chan) 306 return 0; 307 308 pri_freq = hw_get_freq(mode, pri_chan); 309 sec_freq = hw_get_freq(mode, sec_chan); 310 311 affected_start = (pri_freq + sec_freq) / 2 - 25; 312 affected_end = (pri_freq + sec_freq) / 2 + 25; 313 wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz", 314 affected_start, affected_end); 315 for (i = 0; i < scan_res->num; i++) { 316 struct wpa_scan_res *bss = scan_res->res[i]; 317 int pri = bss->freq; 318 int sec = pri; 319 struct ieee802_11_elems elems; 320 321 /* Check for overlapping 20 MHz BSS */ 322 if (check_20mhz_bss(bss, pri_freq, affected_start, 323 affected_end)) { 324 wpa_printf(MSG_DEBUG, 325 "Overlapping 20 MHz BSS is found"); 326 return 0; 327 } 328 329 get_pri_sec_chan(bss, &pri_chan, &sec_chan); 330 331 if (sec_chan) { 332 if (sec_chan < pri_chan) 333 sec = pri - 20; 334 else 335 sec = pri + 20; 336 } 337 338 if ((pri < affected_start || pri > affected_end) && 339 (sec < affected_start || sec > affected_end)) 340 continue; /* not within affected channel range */ 341 342 wpa_printf(MSG_DEBUG, "Neighboring BSS: " MACSTR 343 " freq=%d pri=%d sec=%d", 344 MAC2STR(bss->bssid), bss->freq, pri_chan, sec_chan); 345 346 if (sec_chan) { 347 if (pri_freq != pri || sec_freq != sec) { 348 wpa_printf(MSG_DEBUG, 349 "40 MHz pri/sec mismatch with BSS " 350 MACSTR 351 " <%d,%d> (chan=%d%c) vs. <%d,%d>", 352 MAC2STR(bss->bssid), 353 pri, sec, pri_chan, 354 sec > pri ? '+' : '-', 355 pri_freq, sec_freq); 356 return 0; 357 } 358 } 359 360 ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 361 0); 362 if (elems.ht_capabilities) { 363 struct ieee80211_ht_capabilities *ht_cap = 364 (struct ieee80211_ht_capabilities *) 365 elems.ht_capabilities; 366 367 if (le_to_host16(ht_cap->ht_capabilities_info) & 368 HT_CAP_INFO_40MHZ_INTOLERANT) { 369 wpa_printf(MSG_DEBUG, 370 "40 MHz Intolerant is set on channel %d in BSS " 371 MACSTR, pri, MAC2STR(bss->bssid)); 372 return 0; 373 } 374 } 375 } 376 377 return 1; 378 } 379 380 381 int hostapd_set_freq_params(struct hostapd_freq_params *data, 382 enum hostapd_hw_mode mode, 383 int freq, int channel, int enable_edmg, 384 u8 edmg_channel, int ht_enabled, 385 int vht_enabled, int he_enabled, 386 int sec_channel_offset, 387 int oper_chwidth, int center_segment0, 388 int center_segment1, u32 vht_caps, 389 struct he_capabilities *he_cap) 390 { 391 if (!he_cap || !he_cap->he_supported) 392 he_enabled = 0; 393 os_memset(data, 0, sizeof(*data)); 394 data->mode = mode; 395 data->freq = freq; 396 data->channel = channel; 397 data->ht_enabled = ht_enabled; 398 data->vht_enabled = vht_enabled; 399 data->he_enabled = he_enabled; 400 data->sec_channel_offset = sec_channel_offset; 401 data->center_freq1 = freq + sec_channel_offset * 10; 402 data->center_freq2 = 0; 403 if (oper_chwidth == CHANWIDTH_80MHZ) 404 data->bandwidth = 80; 405 else if (oper_chwidth == CHANWIDTH_160MHZ || 406 oper_chwidth == CHANWIDTH_80P80MHZ) 407 data->bandwidth = 160; 408 else if (sec_channel_offset) 409 data->bandwidth = 40; 410 else 411 data->bandwidth = 20; 412 413 414 hostapd_encode_edmg_chan(enable_edmg, edmg_channel, channel, 415 &data->edmg); 416 417 if (is_6ghz_freq(freq)) { 418 if (!data->he_enabled) { 419 wpa_printf(MSG_ERROR, 420 "Can't set 6 GHz mode - HE isn't enabled"); 421 return -1; 422 } 423 424 if (center_idx_to_bw_6ghz(channel) < 0) { 425 wpa_printf(MSG_ERROR, 426 "Invalid control channel for 6 GHz band"); 427 return -1; 428 } 429 430 if (!center_segment0) { 431 if (center_segment1) { 432 wpa_printf(MSG_ERROR, 433 "Segment 0 center frequency isn't set"); 434 return -1; 435 } 436 if (!sec_channel_offset) 437 data->center_freq1 = data->freq; 438 } else { 439 int freq1, freq2 = 0; 440 int bw = center_idx_to_bw_6ghz(center_segment0); 441 442 if (bw < 0) { 443 wpa_printf(MSG_ERROR, 444 "Invalid center frequency index for 6 GHz"); 445 return -1; 446 } 447 448 freq1 = ieee80211_chan_to_freq(NULL, 131, 449 center_segment0); 450 if (freq1 < 0) { 451 wpa_printf(MSG_ERROR, 452 "Invalid segment 0 center frequency for 6 GHz"); 453 return -1; 454 } 455 456 if (center_segment1) { 457 if (center_idx_to_bw_6ghz(center_segment1) != 2 || 458 bw != 2) { 459 wpa_printf(MSG_ERROR, 460 "6 GHz 80+80 MHz configuration doesn't use valid 80 MHz channels"); 461 return -1; 462 } 463 464 freq2 = ieee80211_chan_to_freq(NULL, 131, 465 center_segment1); 466 if (freq2 < 0) { 467 wpa_printf(MSG_ERROR, 468 "Invalid segment 1 center frequency for UHB"); 469 return -1; 470 } 471 } 472 473 data->bandwidth = (1 << (u8) bw) * 20; 474 data->center_freq1 = freq1; 475 data->center_freq2 = freq2; 476 } 477 data->ht_enabled = 0; 478 data->vht_enabled = 0; 479 480 return 0; 481 } 482 483 if (data->he_enabled) switch (oper_chwidth) { 484 case CHANWIDTH_USE_HT: 485 if (sec_channel_offset == 0) 486 break; 487 488 if (mode == HOSTAPD_MODE_IEEE80211G) { 489 if (!(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] & 490 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_IN_2G)) { 491 wpa_printf(MSG_ERROR, 492 "40 MHz channel width is not supported in 2.4 GHz"); 493 return -1; 494 } 495 break; 496 } 497 /* fall through */ 498 case CHANWIDTH_80MHZ: 499 if (mode == HOSTAPD_MODE_IEEE80211A) { 500 if (!(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] & 501 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 502 wpa_printf(MSG_ERROR, 503 "40/80 MHz channel width is not supported in 5/6 GHz"); 504 return -1; 505 } 506 } 507 break; 508 case CHANWIDTH_80P80MHZ: 509 if (!(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] & 510 HE_PHYCAP_CHANNEL_WIDTH_SET_80PLUS80MHZ_IN_5G)) { 511 wpa_printf(MSG_ERROR, 512 "80+80 MHz channel width is not supported in 5/6 GHz"); 513 return -1; 514 } 515 break; 516 case CHANWIDTH_160MHZ: 517 if (!(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] & 518 HE_PHYCAP_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 519 wpa_printf(MSG_ERROR, 520 "160 MHz channel width is not supported in 5 / 6GHz"); 521 return -1; 522 } 523 break; 524 } else if (data->vht_enabled) switch (oper_chwidth) { 525 case CHANWIDTH_USE_HT: 526 break; 527 case CHANWIDTH_80P80MHZ: 528 if (!(vht_caps & VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)) { 529 wpa_printf(MSG_ERROR, 530 "80+80 channel width is not supported!"); 531 return -1; 532 } 533 /* fall through */ 534 case CHANWIDTH_80MHZ: 535 break; 536 case CHANWIDTH_160MHZ: 537 if (!(vht_caps & (VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 538 VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 539 wpa_printf(MSG_ERROR, 540 "160 MHz channel width is not supported!"); 541 return -1; 542 } 543 break; 544 } 545 546 if (data->he_enabled || data->vht_enabled) switch (oper_chwidth) { 547 case CHANWIDTH_USE_HT: 548 if (center_segment1 || 549 (center_segment0 != 0 && 550 5000 + center_segment0 * 5 != data->center_freq1 && 551 2407 + center_segment0 * 5 != data->center_freq1)) { 552 wpa_printf(MSG_ERROR, 553 "20/40 MHz: center segment 0 (=%d) and center freq 1 (=%d) not in sync", 554 center_segment0, data->center_freq1); 555 return -1; 556 } 557 break; 558 case CHANWIDTH_80P80MHZ: 559 if (center_segment1 == center_segment0 + 4 || 560 center_segment1 == center_segment0 - 4) { 561 wpa_printf(MSG_ERROR, 562 "80+80 MHz: center segment 1 only 20 MHz apart"); 563 return -1; 564 } 565 data->center_freq2 = 5000 + center_segment1 * 5; 566 /* fall through */ 567 case CHANWIDTH_80MHZ: 568 data->bandwidth = 80; 569 if (!sec_channel_offset) { 570 wpa_printf(MSG_ERROR, 571 "80/80+80 MHz: no second channel offset"); 572 return -1; 573 } 574 if (oper_chwidth == CHANWIDTH_80MHZ && center_segment1) { 575 wpa_printf(MSG_ERROR, 576 "80 MHz: center segment 1 configured"); 577 return -1; 578 } 579 if (oper_chwidth == CHANWIDTH_80P80MHZ && !center_segment1) { 580 wpa_printf(MSG_ERROR, 581 "80+80 MHz: center segment 1 not configured"); 582 return -1; 583 } 584 if (!center_segment0) { 585 if (channel <= 48) 586 center_segment0 = 42; 587 else if (channel <= 64) 588 center_segment0 = 58; 589 else if (channel <= 112) 590 center_segment0 = 106; 591 else if (channel <= 128) 592 center_segment0 = 122; 593 else if (channel <= 144) 594 center_segment0 = 138; 595 else if (channel <= 161) 596 center_segment0 = 155; 597 else if (channel <= 177) 598 center_segment0 = 171; 599 data->center_freq1 = 5000 + center_segment0 * 5; 600 } else { 601 /* 602 * Note: HT/VHT config and params are coupled. Check if 603 * HT40 channel band is in VHT80 Pri channel band 604 * configuration. 605 */ 606 if (center_segment0 == channel + 6 || 607 center_segment0 == channel + 2 || 608 center_segment0 == channel - 2 || 609 center_segment0 == channel - 6) 610 data->center_freq1 = 5000 + center_segment0 * 5; 611 else { 612 wpa_printf(MSG_ERROR, 613 "Wrong coupling between HT and VHT/HE channel setting"); 614 return -1; 615 } 616 } 617 break; 618 case CHANWIDTH_160MHZ: 619 data->bandwidth = 160; 620 if (center_segment1) { 621 wpa_printf(MSG_ERROR, 622 "160 MHz: center segment 1 should not be set"); 623 return -1; 624 } 625 if (!sec_channel_offset) { 626 wpa_printf(MSG_ERROR, 627 "160 MHz: second channel offset not set"); 628 return -1; 629 } 630 /* 631 * Note: HT/VHT config and params are coupled. Check if 632 * HT40 channel band is in VHT160 channel band configuration. 633 */ 634 if (center_segment0 == channel + 14 || 635 center_segment0 == channel + 10 || 636 center_segment0 == channel + 6 || 637 center_segment0 == channel + 2 || 638 center_segment0 == channel - 2 || 639 center_segment0 == channel - 6 || 640 center_segment0 == channel - 10 || 641 center_segment0 == channel - 14) 642 data->center_freq1 = 5000 + center_segment0 * 5; 643 else { 644 wpa_printf(MSG_ERROR, 645 "160 MHz: HT40 channel band is not in 160 MHz band"); 646 return -1; 647 } 648 break; 649 } 650 651 return 0; 652 } 653 654 655 void set_disable_ht40(struct ieee80211_ht_capabilities *htcaps, 656 int disabled) 657 { 658 /* Masking these out disables HT40 */ 659 le16 msk = host_to_le16(HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET | 660 HT_CAP_INFO_SHORT_GI40MHZ); 661 662 if (disabled) 663 htcaps->ht_capabilities_info &= ~msk; 664 else 665 htcaps->ht_capabilities_info |= msk; 666 } 667 668 669 #ifdef CONFIG_IEEE80211AC 670 671 static int _ieee80211ac_cap_check(u32 hw, u32 conf, u32 cap, 672 const char *name) 673 { 674 u32 req_cap = conf & cap; 675 676 /* 677 * Make sure we support all requested capabilities. 678 * NOTE: We assume that 'cap' represents a capability mask, 679 * not a discrete value. 680 */ 681 if ((hw & req_cap) != req_cap) { 682 wpa_printf(MSG_ERROR, 683 "Driver does not support configured VHT capability [%s]", 684 name); 685 return 0; 686 } 687 return 1; 688 } 689 690 691 static int ieee80211ac_cap_check_max(u32 hw, u32 conf, u32 mask, 692 unsigned int shift, 693 const char *name) 694 { 695 u32 hw_max = hw & mask; 696 u32 conf_val = conf & mask; 697 698 if (conf_val > hw_max) { 699 wpa_printf(MSG_ERROR, 700 "Configured VHT capability [%s] exceeds max value supported by the driver (%d > %d)", 701 name, conf_val >> shift, hw_max >> shift); 702 return 0; 703 } 704 return 1; 705 } 706 707 708 int ieee80211ac_cap_check(u32 hw, u32 conf) 709 { 710 #define VHT_CAP_CHECK(cap) \ 711 do { \ 712 if (!_ieee80211ac_cap_check(hw, conf, cap, #cap)) \ 713 return 0; \ 714 } while (0) 715 716 #define VHT_CAP_CHECK_MAX(cap) \ 717 do { \ 718 if (!ieee80211ac_cap_check_max(hw, conf, cap, cap ## _SHIFT, \ 719 #cap)) \ 720 return 0; \ 721 } while (0) 722 723 VHT_CAP_CHECK_MAX(VHT_CAP_MAX_MPDU_LENGTH_MASK); 724 VHT_CAP_CHECK_MAX(VHT_CAP_SUPP_CHAN_WIDTH_MASK); 725 VHT_CAP_CHECK(VHT_CAP_RXLDPC); 726 VHT_CAP_CHECK(VHT_CAP_SHORT_GI_80); 727 VHT_CAP_CHECK(VHT_CAP_SHORT_GI_160); 728 VHT_CAP_CHECK(VHT_CAP_TXSTBC); 729 VHT_CAP_CHECK_MAX(VHT_CAP_RXSTBC_MASK); 730 VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMER_CAPABLE); 731 VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMEE_CAPABLE); 732 VHT_CAP_CHECK_MAX(VHT_CAP_BEAMFORMEE_STS_MAX); 733 VHT_CAP_CHECK_MAX(VHT_CAP_SOUNDING_DIMENSION_MAX); 734 VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMER_CAPABLE); 735 VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMEE_CAPABLE); 736 VHT_CAP_CHECK(VHT_CAP_VHT_TXOP_PS); 737 VHT_CAP_CHECK(VHT_CAP_HTC_VHT); 738 VHT_CAP_CHECK_MAX(VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MAX); 739 VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB); 740 VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB); 741 VHT_CAP_CHECK(VHT_CAP_RX_ANTENNA_PATTERN); 742 VHT_CAP_CHECK(VHT_CAP_TX_ANTENNA_PATTERN); 743 744 #undef VHT_CAP_CHECK 745 #undef VHT_CAP_CHECK_MAX 746 747 return 1; 748 } 749 750 #endif /* CONFIG_IEEE80211AC */ 751 752 753 u32 num_chan_to_bw(int num_chans) 754 { 755 switch (num_chans) { 756 case 2: 757 case 4: 758 case 8: 759 return num_chans * 20; 760 default: 761 return 20; 762 } 763 } 764 765 766 /* check if BW is applicable for channel */ 767 int chan_bw_allowed(const struct hostapd_channel_data *chan, u32 bw, 768 int ht40_plus, int pri) 769 { 770 u32 bw_mask; 771 772 switch (bw) { 773 case 20: 774 bw_mask = HOSTAPD_CHAN_WIDTH_20; 775 break; 776 case 40: 777 /* HT 40 MHz support declared only for primary channel, 778 * just skip 40 MHz secondary checking */ 779 if (pri && ht40_plus) 780 bw_mask = HOSTAPD_CHAN_WIDTH_40P; 781 else if (pri && !ht40_plus) 782 bw_mask = HOSTAPD_CHAN_WIDTH_40M; 783 else 784 bw_mask = 0; 785 break; 786 case 80: 787 bw_mask = HOSTAPD_CHAN_WIDTH_80; 788 break; 789 case 160: 790 bw_mask = HOSTAPD_CHAN_WIDTH_160; 791 break; 792 default: 793 bw_mask = 0; 794 break; 795 } 796 797 return (chan->allowed_bw & bw_mask) == bw_mask; 798 } 799 800 801 /* check if channel is allowed to be used as primary */ 802 int chan_pri_allowed(const struct hostapd_channel_data *chan) 803 { 804 return !(chan->flag & HOSTAPD_CHAN_DISABLED) && 805 (chan->allowed_bw & HOSTAPD_CHAN_WIDTH_20); 806 } 807