1 /* $OpenBSD: if_iwm.c,v 1.39 2015/03/23 00:35:19 jsg Exp $ */ 2 3 /* 4 * Copyright (c) 2014 genua mbh <info@genua.de> 5 * Copyright (c) 2014 Fixup Software Ltd. 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /*- 21 * Based on BSD-licensed source modules in the Linux iwlwifi driver, 22 * which were used as the reference documentation for this implementation. 23 * 24 * Driver version we are currently based off of is 25 * Linux 3.14.3 (tag id a2df521e42b1d9a23f620ac79dbfe8655a8391dd) 26 * 27 *********************************************************************** 28 * 29 * This file is provided under a dual BSD/GPLv2 license. When using or 30 * redistributing this file, you may do so under either license. 31 * 32 * GPL LICENSE SUMMARY 33 * 34 * Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved. 35 * 36 * This program is free software; you can redistribute it and/or modify 37 * it under the terms of version 2 of the GNU General Public License as 38 * published by the Free Software Foundation. 39 * 40 * This program is distributed in the hope that it will be useful, but 41 * WITHOUT ANY WARRANTY; without even the implied warranty of 42 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 43 * General Public License for more details. 44 * 45 * You should have received a copy of the GNU General Public License 46 * along with this program; if not, write to the Free Software 47 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 48 * USA 49 * 50 * The full GNU General Public License is included in this distribution 51 * in the file called COPYING. 52 * 53 * Contact Information: 54 * Intel Linux Wireless <ilw@linux.intel.com> 55 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 56 * 57 * 58 * BSD LICENSE 59 * 60 * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved. 61 * All rights reserved. 62 * 63 * Redistribution and use in source and binary forms, with or without 64 * modification, are permitted provided that the following conditions 65 * are met: 66 * 67 * * Redistributions of source code must retain the above copyright 68 * notice, this list of conditions and the following disclaimer. 69 * * Redistributions in binary form must reproduce the above copyright 70 * notice, this list of conditions and the following disclaimer in 71 * the documentation and/or other materials provided with the 72 * distribution. 73 * * Neither the name Intel Corporation nor the names of its 74 * contributors may be used to endorse or promote products derived 75 * from this software without specific prior written permission. 76 * 77 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 78 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 79 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 80 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 81 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 82 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 83 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 84 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 85 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 86 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 87 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 88 */ 89 90 /*- 91 * Copyright (c) 2007-2010 Damien Bergamini <damien.bergamini@free.fr> 92 * 93 * Permission to use, copy, modify, and distribute this software for any 94 * purpose with or without fee is hereby granted, provided that the above 95 * copyright notice and this permission notice appear in all copies. 96 * 97 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 98 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 99 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 100 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 101 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 102 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 103 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 104 */ 105 #include <sys/cdefs.h> 106 __FBSDID("$FreeBSD$"); 107 108 #include <sys/param.h> 109 #include <sys/bus.h> 110 #include <sys/endian.h> 111 #include <sys/firmware.h> 112 #include <sys/kernel.h> 113 #include <sys/malloc.h> 114 #include <sys/mbuf.h> 115 #include <sys/rman.h> 116 #include <sys/sysctl.h> 117 #include <sys/linker.h> 118 119 #include <machine/endian.h> 120 121 #include <bus/pci/pcivar.h> 122 #include <bus/pci/pcireg.h> 123 124 #include <net/bpf.h> 125 126 #include <net/if.h> 127 #include <net/if_var.h> 128 #include <net/if_arp.h> 129 #include <net/if_dl.h> 130 #include <net/if_media.h> 131 #include <net/if_types.h> 132 133 #include <netinet/in.h> 134 #include <netinet/in_systm.h> 135 #include <netinet/if_ether.h> 136 #include <netinet/ip.h> 137 138 #include <netproto/802_11/ieee80211_var.h> 139 #include <netproto/802_11/ieee80211_regdomain.h> 140 #include <netproto/802_11/ieee80211_ratectl.h> 141 #include <netproto/802_11/ieee80211_radiotap.h> 142 143 #include "if_iwmreg.h" 144 #include "if_iwmvar.h" 145 #include "if_iwm_debug.h" 146 #include "if_iwm_notif_wait.h" 147 #include "if_iwm_util.h" 148 #include "if_iwm_scan.h" 149 150 #define IWM_DENSE_EBS_SCAN_RATIO 5 151 #define IWM_SPARSE_EBS_SCAN_RATIO 1 152 153 static uint16_t 154 iwm_mvm_scan_rx_chain(struct iwm_softc *sc) 155 { 156 uint16_t rx_chain; 157 uint8_t rx_ant; 158 159 rx_ant = iwm_mvm_get_valid_rx_ant(sc); 160 rx_chain = rx_ant << IWM_PHY_RX_CHAIN_VALID_POS; 161 rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 162 rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_SEL_POS; 163 rx_chain |= 0x1 << IWM_PHY_RX_CHAIN_DRIVER_FORCE_POS; 164 return htole16(rx_chain); 165 } 166 167 static uint32_t 168 iwm_mvm_scan_rxon_flags(struct ieee80211_channel *c) 169 { 170 if (IEEE80211_IS_CHAN_2GHZ(c)) 171 return htole32(IWM_PHY_BAND_24); 172 else 173 return htole32(IWM_PHY_BAND_5); 174 } 175 176 static uint32_t 177 iwm_mvm_scan_rate_n_flags(struct iwm_softc *sc, int flags, int no_cck) 178 { 179 uint32_t tx_ant; 180 int i, ind; 181 182 for (i = 0, ind = sc->sc_scan_last_antenna; 183 i < IWM_RATE_MCS_ANT_NUM; i++) { 184 ind = (ind + 1) % IWM_RATE_MCS_ANT_NUM; 185 if (iwm_mvm_get_valid_tx_ant(sc) & (1 << ind)) { 186 sc->sc_scan_last_antenna = ind; 187 break; 188 } 189 } 190 tx_ant = (1 << sc->sc_scan_last_antenna) << IWM_RATE_MCS_ANT_POS; 191 192 if ((flags & IEEE80211_CHAN_2GHZ) && !no_cck) 193 return htole32(IWM_RATE_1M_PLCP | IWM_RATE_MCS_CCK_MSK | 194 tx_ant); 195 else 196 return htole32(IWM_RATE_6M_PLCP | tx_ant); 197 } 198 199 static inline boolean_t 200 iwm_mvm_rrm_scan_needed(struct iwm_softc *sc) 201 { 202 /* require rrm scan whenever the fw supports it */ 203 return fw_has_capa(&sc->ucode_capa, 204 IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 205 } 206 207 #ifdef IWM_DEBUG 208 static const char * 209 iwm_mvm_ebs_status_str(enum iwm_scan_ebs_status status) 210 { 211 switch (status) { 212 case IWM_SCAN_EBS_SUCCESS: 213 return "successful"; 214 case IWM_SCAN_EBS_INACTIVE: 215 return "inactive"; 216 case IWM_SCAN_EBS_FAILED: 217 case IWM_SCAN_EBS_CHAN_NOT_FOUND: 218 default: 219 return "failed"; 220 } 221 } 222 #endif 223 224 void 225 iwm_mvm_rx_lmac_scan_complete_notif(struct iwm_softc *sc, 226 struct iwm_rx_packet *pkt) 227 { 228 struct iwm_periodic_scan_complete *scan_notif = (void *)pkt->data; 229 #ifdef IWM_DEBUG 230 boolean_t aborted = (scan_notif->status == IWM_SCAN_OFFLOAD_ABORTED); 231 #endif 232 233 /* If this happens, the firmware has mistakenly sent an LMAC 234 * notification during UMAC scans -- warn and ignore it. 235 */ 236 if (fw_has_capa(&sc->ucode_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) { 237 device_printf(sc->sc_dev, 238 "%s: Mistakenly got LMAC notification during UMAC scan\n", 239 __func__); 240 return; 241 } 242 243 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Regular scan %s, EBS status %s (FW)\n", 244 aborted ? "aborted" : "completed", 245 iwm_mvm_ebs_status_str(scan_notif->ebs_status)); 246 247 sc->last_ebs_successful = 248 scan_notif->ebs_status == IWM_SCAN_EBS_SUCCESS || 249 scan_notif->ebs_status == IWM_SCAN_EBS_INACTIVE; 250 251 } 252 253 void 254 iwm_mvm_rx_umac_scan_complete_notif(struct iwm_softc *sc, 255 struct iwm_rx_packet *pkt) 256 { 257 struct iwm_umac_scan_complete *notif = (void *)pkt->data; 258 #ifdef IWM_DEBUG 259 uint32_t uid = le32toh(notif->uid); 260 boolean_t aborted = (notif->status == IWM_SCAN_OFFLOAD_ABORTED); 261 #endif 262 263 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 264 "Scan completed, uid %u, status %s, EBS status %s\n", 265 uid, 266 aborted ? "aborted" : "completed", 267 iwm_mvm_ebs_status_str(notif->ebs_status)); 268 269 if (notif->ebs_status != IWM_SCAN_EBS_SUCCESS && 270 notif->ebs_status != IWM_SCAN_EBS_INACTIVE) 271 sc->last_ebs_successful = FALSE; 272 } 273 274 static int 275 iwm_mvm_scan_skip_channel(struct ieee80211_channel *c) 276 { 277 if (IEEE80211_IS_CHAN_2GHZ(c) && IEEE80211_IS_CHAN_B(c)) 278 return 0; 279 else if (IEEE80211_IS_CHAN_5GHZ(c) && IEEE80211_IS_CHAN_A(c)) 280 return 0; 281 else 282 return 1; 283 } 284 285 static uint8_t 286 iwm_mvm_lmac_scan_fill_channels(struct iwm_softc *sc, 287 struct iwm_scan_channel_cfg_lmac *chan, int n_ssids) 288 { 289 struct ieee80211com *ic = &sc->sc_ic; 290 struct ieee80211_scan_state *ss = ic->ic_scan; 291 struct ieee80211_channel *c; 292 uint8_t nchan; 293 int j; 294 295 for (nchan = j = 0; 296 j < ss->ss_last && nchan < sc->ucode_capa.n_scan_channels; j++) { 297 c = ss->ss_chans[j]; 298 /* 299 * Catch other channels, in case we have 900MHz channels or 300 * something in the chanlist. 301 */ 302 if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) { 303 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 304 "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n", 305 __func__, c->ic_freq, c->ic_ieee, c->ic_flags); 306 continue; 307 } 308 309 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 310 "Adding channel %d (%d Mhz) to the list\n", 311 nchan, c->ic_freq); 312 chan->channel_num = htole16(ieee80211_mhz2ieee(c->ic_freq, 0)); 313 chan->iter_count = htole16(1); 314 chan->iter_interval = htole32(0); 315 chan->flags = htole32(IWM_UNIFIED_SCAN_CHANNEL_PARTIAL); 316 #if 0 /* makes scanning while associated less useful */ 317 if (n_ssids != 0) 318 chan->flags |= htole32(1 << 1); /* select SSID 0 */ 319 #endif 320 chan++; 321 nchan++; 322 } 323 324 return nchan; 325 } 326 327 static uint8_t 328 iwm_mvm_umac_scan_fill_channels(struct iwm_softc *sc, 329 struct iwm_scan_channel_cfg_umac *chan, int n_ssids) 330 { 331 struct ieee80211com *ic = &sc->sc_ic; 332 struct ieee80211_scan_state *ss = ic->ic_scan; 333 struct ieee80211_channel *c; 334 uint8_t nchan; 335 int j; 336 337 for (nchan = j = 0; 338 j < ss->ss_last && nchan < sc->ucode_capa.n_scan_channels; j++) { 339 c = ss->ss_chans[j]; 340 /* 341 * Catch other channels, in case we have 900MHz channels or 342 * something in the chanlist. 343 */ 344 if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) { 345 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 346 "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n", 347 __func__, c->ic_freq, c->ic_ieee, c->ic_flags); 348 continue; 349 } 350 351 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 352 "Adding channel %d (%d Mhz) to the list\n", 353 nchan, c->ic_freq); 354 chan->channel_num = ieee80211_mhz2ieee(c->ic_freq, 0); 355 chan->iter_count = 1; 356 chan->iter_interval = htole16(0); 357 chan->flags = htole32(0); 358 #if 0 /* makes scanning while associated less useful */ 359 if (n_ssids != 0) 360 chan->flags = htole32(1 << 0); /* select SSID 0 */ 361 #endif 362 chan++; 363 nchan++; 364 } 365 366 return nchan; 367 } 368 369 static int 370 iwm_mvm_fill_probe_req(struct iwm_softc *sc, struct iwm_scan_probe_req *preq) 371 { 372 struct ieee80211com *ic = &sc->sc_ic; 373 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 374 struct ieee80211_frame *wh = (struct ieee80211_frame *)preq->buf; 375 struct ieee80211_rateset *rs; 376 size_t remain = sizeof(preq->buf); 377 uint8_t *frm, *pos; 378 int ssid_len = 0; 379 const uint8_t *ssid = NULL; 380 381 memset(preq, 0, sizeof(*preq)); 382 383 /* Ensure enough space for header and SSID IE. */ 384 if (remain < sizeof(*wh) + 2 + ssid_len) 385 return ENOBUFS; 386 387 /* 388 * Build a probe request frame. Most of the following code is a 389 * copy & paste of what is done in net80211. 390 */ 391 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 392 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 393 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 394 IEEE80211_ADDR_COPY(wh->i_addr1, ieee80211broadcastaddr); 395 IEEE80211_ADDR_COPY(wh->i_addr2, vap ? vap->iv_myaddr : ic->ic_macaddr); 396 IEEE80211_ADDR_COPY(wh->i_addr3, ieee80211broadcastaddr); 397 *(uint16_t *)&wh->i_dur[0] = 0; /* filled by HW */ 398 *(uint16_t *)&wh->i_seq[0] = 0; /* filled by HW */ 399 400 frm = (uint8_t *)(wh + 1); 401 frm = ieee80211_add_ssid(frm, ssid, ssid_len); 402 403 /* Tell the firmware where the MAC header is. */ 404 preq->mac_header.offset = 0; 405 preq->mac_header.len = htole16(frm - (uint8_t *)wh); 406 remain -= frm - (uint8_t *)wh; 407 408 /* Fill in 2GHz IEs and tell firmware where they are. */ 409 rs = &ic->ic_sup_rates[IEEE80211_MODE_11G]; 410 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 411 if (remain < 4 + rs->rs_nrates) 412 return ENOBUFS; 413 } else if (remain < 2 + rs->rs_nrates) { 414 return ENOBUFS; 415 } 416 preq->band_data[0].offset = htole16(frm - (uint8_t *)wh); 417 pos = frm; 418 frm = ieee80211_add_rates(frm, rs); 419 if (rs->rs_nrates > IEEE80211_RATE_SIZE) 420 frm = ieee80211_add_xrates(frm, rs); 421 preq->band_data[0].len = htole16(frm - pos); 422 remain -= frm - pos; 423 424 if (iwm_mvm_rrm_scan_needed(sc)) { 425 if (remain < 3) 426 return ENOBUFS; 427 *frm++ = IEEE80211_ELEMID_DSPARMS; 428 *frm++ = 1; 429 *frm++ = 0; 430 remain -= 3; 431 } 432 433 if (sc->nvm_data->sku_cap_band_52GHz_enable) { 434 /* Fill in 5GHz IEs. */ 435 rs = &ic->ic_sup_rates[IEEE80211_MODE_11A]; 436 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 437 if (remain < 4 + rs->rs_nrates) 438 return ENOBUFS; 439 } else if (remain < 2 + rs->rs_nrates) { 440 return ENOBUFS; 441 } 442 preq->band_data[1].offset = htole16(frm - (uint8_t *)wh); 443 pos = frm; 444 frm = ieee80211_add_rates(frm, rs); 445 if (rs->rs_nrates > IEEE80211_RATE_SIZE) 446 frm = ieee80211_add_xrates(frm, rs); 447 preq->band_data[1].len = htole16(frm - pos); 448 remain -= frm - pos; 449 } 450 451 /* Send 11n IEs on both 2GHz and 5GHz bands. */ 452 preq->common_data.offset = htole16(frm - (uint8_t *)wh); 453 pos = frm; 454 #if 0 455 if (ic->ic_flags & IEEE80211_F_HTON) { 456 if (remain < 28) 457 return ENOBUFS; 458 frm = ieee80211_add_htcaps(frm, ic); 459 /* XXX add WME info? */ 460 } 461 #endif 462 preq->common_data.len = htole16(frm - pos); 463 464 return 0; 465 } 466 467 int 468 iwm_mvm_config_umac_scan(struct iwm_softc *sc) 469 { 470 struct ieee80211com *ic = &sc->sc_ic; 471 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 472 473 struct iwm_scan_config *scan_config; 474 int ret, j, nchan; 475 size_t cmd_size; 476 struct ieee80211_channel *c; 477 struct iwm_host_cmd hcmd = { 478 .id = iwm_cmd_id(IWM_SCAN_CFG_CMD, IWM_ALWAYS_LONG_GROUP, 0), 479 .flags = IWM_CMD_SYNC, 480 }; 481 static const uint32_t rates = (IWM_SCAN_CONFIG_RATE_1M | 482 IWM_SCAN_CONFIG_RATE_2M | IWM_SCAN_CONFIG_RATE_5M | 483 IWM_SCAN_CONFIG_RATE_11M | IWM_SCAN_CONFIG_RATE_6M | 484 IWM_SCAN_CONFIG_RATE_9M | IWM_SCAN_CONFIG_RATE_12M | 485 IWM_SCAN_CONFIG_RATE_18M | IWM_SCAN_CONFIG_RATE_24M | 486 IWM_SCAN_CONFIG_RATE_36M | IWM_SCAN_CONFIG_RATE_48M | 487 IWM_SCAN_CONFIG_RATE_54M); 488 489 cmd_size = sizeof(*scan_config) + sc->ucode_capa.n_scan_channels; 490 491 scan_config = kmalloc(cmd_size, M_DEVBUF, M_INTWAIT | M_ZERO); 492 if (scan_config == NULL) 493 return ENOMEM; 494 495 scan_config->tx_chains = htole32(iwm_mvm_get_valid_tx_ant(sc)); 496 scan_config->rx_chains = htole32(iwm_mvm_get_valid_rx_ant(sc)); 497 scan_config->legacy_rates = htole32(rates | 498 IWM_SCAN_CONFIG_SUPPORTED_RATE(rates)); 499 500 /* These timings correspond to iwlwifi's UNASSOC scan. */ 501 scan_config->dwell_active = 10; 502 scan_config->dwell_passive = 110; 503 scan_config->dwell_fragmented = 44; 504 scan_config->dwell_extended = 90; 505 scan_config->out_of_channel_time = htole32(0); 506 scan_config->suspend_time = htole32(0); 507 508 IEEE80211_ADDR_COPY(scan_config->mac_addr, 509 vap ? vap->iv_myaddr : ic->ic_macaddr); 510 511 scan_config->bcast_sta_id = sc->sc_aux_sta.sta_id; 512 scan_config->channel_flags = IWM_CHANNEL_FLAG_EBS | 513 IWM_CHANNEL_FLAG_ACCURATE_EBS | IWM_CHANNEL_FLAG_EBS_ADD | 514 IWM_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 515 516 for (nchan = j = 0; 517 j < ic->ic_nchans && nchan < sc->ucode_capa.n_scan_channels; j++) { 518 c = &ic->ic_channels[j]; 519 /* For 2GHz, only populate 11b channels */ 520 /* For 5GHz, only populate 11a channels */ 521 /* 522 * Catch other channels, in case we have 900MHz channels or 523 * something in the chanlist. 524 */ 525 if (iwm_mvm_scan_skip_channel(c)) 526 continue; 527 scan_config->channel_array[nchan++] = 528 ieee80211_mhz2ieee(c->ic_freq, 0); 529 } 530 531 scan_config->flags = htole32(IWM_SCAN_CONFIG_FLAG_ACTIVATE | 532 IWM_SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 533 IWM_SCAN_CONFIG_FLAG_SET_TX_CHAINS | 534 IWM_SCAN_CONFIG_FLAG_SET_RX_CHAINS | 535 IWM_SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 536 IWM_SCAN_CONFIG_FLAG_SET_ALL_TIMES | 537 IWM_SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 538 IWM_SCAN_CONFIG_FLAG_SET_MAC_ADDR | 539 IWM_SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS| 540 IWM_SCAN_CONFIG_N_CHANNELS(nchan) | 541 IWM_SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED); 542 543 hcmd.data[0] = scan_config; 544 hcmd.len[0] = cmd_size; 545 546 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending UMAC scan config\n"); 547 548 ret = iwm_send_cmd(sc, &hcmd); 549 if (!ret) 550 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 551 "UMAC scan config was sent successfully\n"); 552 553 kfree(scan_config, M_DEVBUF); 554 return ret; 555 } 556 557 static boolean_t 558 iwm_mvm_scan_use_ebs(struct iwm_softc *sc) 559 { 560 const struct iwm_ucode_capabilities *capa = &sc->ucode_capa; 561 562 /* We can only use EBS if: 563 * 1. the feature is supported; 564 * 2. the last EBS was successful; 565 * 3. if only single scan, the single scan EBS API is supported; 566 * 4. it's not a p2p find operation. 567 */ 568 return ((capa->flags & IWM_UCODE_TLV_FLAGS_EBS_SUPPORT) && 569 sc->last_ebs_successful); 570 } 571 572 int 573 iwm_mvm_umac_scan(struct iwm_softc *sc) 574 { 575 struct iwm_host_cmd hcmd = { 576 .id = iwm_cmd_id(IWM_SCAN_REQ_UMAC, IWM_ALWAYS_LONG_GROUP, 0), 577 .len = { 0, }, 578 .data = { NULL, }, 579 .flags = IWM_CMD_SYNC, 580 }; 581 struct iwm_scan_req_umac *req; 582 struct iwm_scan_req_umac_tail *tail; 583 size_t req_len; 584 int ssid_len = 0; 585 const uint8_t *ssid = NULL; 586 int ret; 587 588 req_len = sizeof(struct iwm_scan_req_umac) + 589 (sizeof(struct iwm_scan_channel_cfg_umac) * 590 sc->ucode_capa.n_scan_channels) + 591 sizeof(struct iwm_scan_req_umac_tail); 592 if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE) 593 return ENOMEM; 594 req = kmalloc(req_len, M_DEVBUF, M_INTWAIT | M_ZERO); 595 if (req == NULL) 596 return ENOMEM; 597 598 hcmd.len[0] = (uint16_t)req_len; 599 hcmd.data[0] = (void *)req; 600 601 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Handling ieee80211 scan request\n"); 602 603 /* These timings correspond to iwlwifi's UNASSOC scan. */ 604 req->active_dwell = 10; 605 req->passive_dwell = 110; 606 req->fragmented_dwell = 44; 607 req->extended_dwell = 90; 608 req->max_out_time = 0; 609 req->suspend_time = 0; 610 611 req->scan_priority = htole32(IWM_SCAN_PRIORITY_HIGH); 612 req->ooc_priority = htole32(IWM_SCAN_PRIORITY_HIGH); 613 614 req->n_channels = iwm_mvm_umac_scan_fill_channels(sc, 615 (struct iwm_scan_channel_cfg_umac *)req->data, ssid_len != 0); 616 617 req->general_flags = htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASS_ALL | 618 IWM_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE | 619 IWM_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL); 620 621 if (iwm_mvm_rrm_scan_needed(sc)) 622 req->general_flags |= 623 htole32(IWM_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED); 624 625 tail = (void *)((char *)&req->data + 626 sizeof(struct iwm_scan_channel_cfg_umac) * 627 sc->ucode_capa.n_scan_channels); 628 629 /* Check if we're doing an active directed scan. */ 630 if (ssid_len != 0) { 631 tail->direct_scan[0].id = IEEE80211_ELEMID_SSID; 632 tail->direct_scan[0].len = ssid_len; 633 memcpy(tail->direct_scan[0].ssid, ssid, ssid_len); 634 req->general_flags |= 635 htole32(IWM_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT); 636 } else { 637 req->general_flags |= htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASSIVE); 638 } 639 640 if (iwm_mvm_scan_use_ebs(sc)) 641 req->channel_flags = IWM_SCAN_CHANNEL_FLAG_EBS | 642 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 643 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD; 644 645 ret = iwm_mvm_fill_probe_req(sc, &tail->preq); 646 if (ret) { 647 kfree(req, M_DEVBUF); 648 return ret; 649 } 650 651 /* Specify the scan plan: We'll do one iteration. */ 652 tail->schedule[0].interval = 0; 653 tail->schedule[0].iter_count = 1; 654 655 ret = iwm_send_cmd(sc, &hcmd); 656 if (!ret) 657 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 658 "Scan request was sent successfully\n"); 659 kfree(req, M_DEVBUF); 660 return ret; 661 } 662 663 int 664 iwm_mvm_lmac_scan(struct iwm_softc *sc) 665 { 666 struct iwm_host_cmd hcmd = { 667 .id = IWM_SCAN_OFFLOAD_REQUEST_CMD, 668 .len = { 0, }, 669 .data = { NULL, }, 670 .flags = IWM_CMD_SYNC, 671 }; 672 struct iwm_scan_req_lmac *req; 673 size_t req_len; 674 int ret; 675 int ssid_len = 0; 676 const uint8_t *ssid = NULL; 677 678 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 679 "Handling ieee80211 scan request\n"); 680 681 req_len = sizeof(struct iwm_scan_req_lmac) + 682 (sizeof(struct iwm_scan_channel_cfg_lmac) * 683 sc->ucode_capa.n_scan_channels) + sizeof(struct iwm_scan_probe_req); 684 if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE) 685 return ENOMEM; 686 req = kmalloc(req_len, M_DEVBUF, M_INTWAIT | M_ZERO); 687 if (req == NULL) 688 return ENOMEM; 689 690 hcmd.len[0] = (uint16_t)req_len; 691 hcmd.data[0] = (void *)req; 692 693 /* These timings correspond to iwlwifi's UNASSOC scan. */ 694 req->active_dwell = 10; 695 req->passive_dwell = 110; 696 req->fragmented_dwell = 44; 697 req->extended_dwell = 90; 698 req->max_out_time = 0; 699 req->suspend_time = 0; 700 701 req->scan_prio = htole32(IWM_SCAN_PRIORITY_HIGH); 702 req->rx_chain_select = iwm_mvm_scan_rx_chain(sc); 703 req->iter_num = htole32(1); 704 req->delay = 0; 705 706 req->scan_flags = htole32(IWM_MVM_LMAC_SCAN_FLAG_PASS_ALL | 707 IWM_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE | 708 IWM_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL); 709 if (ssid_len == 0) 710 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAG_PASSIVE); 711 else 712 req->scan_flags |= 713 htole32(IWM_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION); 714 if (iwm_mvm_rrm_scan_needed(sc)) 715 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED); 716 717 req->flags = iwm_mvm_scan_rxon_flags(sc->sc_ic.ic_scan->ss_chans[0]); 718 req->filter_flags = 719 htole32(IWM_MAC_FILTER_ACCEPT_GRP | IWM_MAC_FILTER_IN_BEACON); 720 721 /* Tx flags 2 GHz. */ 722 req->tx_cmd[0].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL | 723 IWM_TX_CMD_FLG_BT_DIS); 724 req->tx_cmd[0].rate_n_flags = 725 iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_2GHZ, 1/*XXX*/); 726 req->tx_cmd[0].sta_id = sc->sc_aux_sta.sta_id; 727 728 /* Tx flags 5 GHz. */ 729 req->tx_cmd[1].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL | 730 IWM_TX_CMD_FLG_BT_DIS); 731 req->tx_cmd[1].rate_n_flags = 732 iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_5GHZ, 1/*XXX*/); 733 req->tx_cmd[1].sta_id = sc->sc_aux_sta.sta_id; 734 735 /* Check if we're doing an active directed scan. */ 736 if (ssid_len != 0) { 737 req->direct_scan[0].id = IEEE80211_ELEMID_SSID; 738 req->direct_scan[0].len = ssid_len; 739 memcpy(req->direct_scan[0].ssid, ssid, ssid_len); 740 } 741 742 req->n_channels = iwm_mvm_lmac_scan_fill_channels(sc, 743 (struct iwm_scan_channel_cfg_lmac *)req->data, 744 ssid_len != 0); 745 746 ret = iwm_mvm_fill_probe_req(sc, 747 (struct iwm_scan_probe_req *)(req->data + 748 (sizeof(struct iwm_scan_channel_cfg_lmac) * 749 sc->ucode_capa.n_scan_channels))); 750 if (ret) { 751 kfree(req, M_DEVBUF); 752 return ret; 753 } 754 755 /* Specify the scan plan: We'll do one iteration. */ 756 req->schedule[0].iterations = 1; 757 req->schedule[0].full_scan_mul = 1; 758 759 if (iwm_mvm_scan_use_ebs(sc)) { 760 req->channel_opt[0].flags = 761 htole16(IWM_SCAN_CHANNEL_FLAG_EBS | 762 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 763 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD); 764 req->channel_opt[0].non_ebs_ratio = 765 htole16(IWM_DENSE_EBS_SCAN_RATIO); 766 req->channel_opt[1].flags = 767 htole16(IWM_SCAN_CHANNEL_FLAG_EBS | 768 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 769 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD); 770 req->channel_opt[1].non_ebs_ratio = 771 htole16(IWM_SPARSE_EBS_SCAN_RATIO); 772 } 773 774 ret = iwm_send_cmd(sc, &hcmd); 775 if (!ret) { 776 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 777 "Scan request was sent successfully\n"); 778 } 779 kfree(req, M_DEVBUF); 780 return ret; 781 } 782 783 static int 784 iwm_mvm_lmac_scan_abort(struct iwm_softc *sc) 785 { 786 int ret; 787 struct iwm_host_cmd hcmd = { 788 .id = IWM_SCAN_OFFLOAD_ABORT_CMD, 789 .len = { 0, }, 790 .data = { NULL, }, 791 .flags = IWM_CMD_SYNC, 792 }; 793 uint32_t status; 794 795 ret = iwm_mvm_send_cmd_status(sc, &hcmd, &status); 796 if (ret) 797 return ret; 798 799 if (status != IWM_CAN_ABORT_STATUS) { 800 /* 801 * The scan abort will return 1 for success or 802 * 2 for "failure". A failure condition can be 803 * due to simply not being in an active scan which 804 * can occur if we send the scan abort before the 805 * microcode has notified us that a scan is completed. 806 */ 807 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 808 "SCAN OFFLOAD ABORT ret %d.\n", status); 809 ret = ENOENT; 810 } 811 812 return ret; 813 } 814 815 static int 816 iwm_mvm_umac_scan_abort(struct iwm_softc *sc) 817 { 818 struct iwm_umac_scan_abort cmd = {}; 819 int uid, ret; 820 821 uid = 0; 822 cmd.uid = htole32(uid); 823 824 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending scan abort, uid %u\n", uid); 825 826 ret = iwm_mvm_send_cmd_pdu(sc, 827 iwm_cmd_id(IWM_SCAN_ABORT_UMAC, 828 IWM_ALWAYS_LONG_GROUP, 0), 829 0, sizeof(cmd), &cmd); 830 831 return ret; 832 } 833 834 int 835 iwm_mvm_scan_stop_wait(struct iwm_softc *sc) 836 { 837 struct iwm_notification_wait wait_scan_done; 838 static const uint16_t scan_done_notif[] = { IWM_SCAN_COMPLETE_UMAC, 839 IWM_SCAN_OFFLOAD_COMPLETE, }; 840 int ret; 841 842 iwm_init_notification_wait(sc->sc_notif_wait, &wait_scan_done, 843 scan_done_notif, NELEM(scan_done_notif), 844 NULL, NULL); 845 846 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Preparing to stop scan\n"); 847 848 if (fw_has_capa(&sc->ucode_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) 849 ret = iwm_mvm_umac_scan_abort(sc); 850 else 851 ret = iwm_mvm_lmac_scan_abort(sc); 852 853 if (ret) { 854 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "couldn't stop scan\n"); 855 iwm_remove_notification(sc->sc_notif_wait, &wait_scan_done); 856 return ret; 857 } 858 859 IWM_UNLOCK(sc); 860 ret = iwm_wait_notification(sc->sc_notif_wait, &wait_scan_done, hz); 861 IWM_LOCK(sc); 862 863 return ret; 864 } 865