sys/dev/iwm/if_iwm_scan.c

   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 "opt_wlan.h"
 109
 110 #include <sys/param.h>
 111 #include <sys/bus.h>
 112 #include <sys/conf.h>
 113 #include <sys/endian.h>
 114 #include <sys/firmware.h>
 115 #include <sys/kernel.h>
 116 #include <sys/malloc.h>
 117 #include <sys/mbuf.h>
 118 #include <sys/mutex.h>
 119 #include <sys/module.h>
 120 #include <sys/proc.h>
 121 #include <sys/rman.h>
 122 #include <sys/socket.h>
 123 #include <sys/sockio.h>
 124 #include <sys/sysctl.h>
 125 #include <sys/linker.h>
 126
 127 #include <machine/bus.h>
 128 #include <machine/endian.h>
 129 #include <machine/resource.h>
 130
 131 #include <dev/pci/pcivar.h>
 132 #include <dev/pci/pcireg.h>
 133
 134 #include <net/bpf.h>
 135
 136 #include <net/if.h>
 137 #include <net/if_var.h>
 138 #include <net/if_arp.h>
 139 #include <net/if_dl.h>
 140 #include <net/if_media.h>
 141 #include <net/if_types.h>
 142
 143 #include <netinet/in.h>
 144 #include <netinet/in_systm.h>
 145 #include <netinet/if_ether.h>
 146 #include <netinet/ip.h>
 147
 148 #include <net80211/ieee80211_var.h>
 149 #include <net80211/ieee80211_regdomain.h>
 150 #include <net80211/ieee80211_ratectl.h>
 151 #include <net80211/ieee80211_radiotap.h>
 152
 153 #include <dev/iwm/if_iwmreg.h>
 154 #include <dev/iwm/if_iwmvar.h>
 155 #include <dev/iwm/if_iwm_debug.h>
 156 #include <dev/iwm/if_iwm_util.h>
 157 #include <dev/iwm/if_iwm_scan.h>
 158
 159 /*
 160  * BEGIN mvm/scan.c
 161  */
 162
 163 #define IWM_PLCP_QUIET_THRESH 1
 164 #define IWM_ACTIVE_QUIET_TIME 10
 165 #define LONG_OUT_TIME_PERIOD (600 * IEEE80211_DUR_TU)
 166 #define SHORT_OUT_TIME_PERIOD (200 * IEEE80211_DUR_TU)
 167 #define SUSPEND_TIME_PERIOD (100 * IEEE80211_DUR_TU)
 168
 169 static uint16_t
 170 iwm_mvm_scan_rx_chain(struct iwm_softc *sc)
 171 {
 172         uint16_t rx_chain;
 173         uint8_t rx_ant;
 174
 175         rx_ant = iwm_fw_valid_rx_ant(sc);
 176         rx_chain = rx_ant << IWM_PHY_RX_CHAIN_VALID_POS;
 177         rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
 178         rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_SEL_POS;
 179         rx_chain |= 0x1 << IWM_PHY_RX_CHAIN_DRIVER_FORCE_POS;
 180         return htole16(rx_chain);
 181 }
 182
 183 #if 0
 184 static uint32_t
 185 iwm_mvm_scan_max_out_time(struct iwm_softc *sc, uint32_t flags, int is_assoc)
 186 {
 187         if (!is_assoc)
 188                 return 0;
 189         if (flags & 0x1)
 190                 return htole32(SHORT_OUT_TIME_PERIOD);
 191         return htole32(LONG_OUT_TIME_PERIOD);
 192 }
 193
 194 static uint32_t
 195 iwm_mvm_scan_suspend_time(struct iwm_softc *sc, int is_assoc)
 196 {
 197         if (!is_assoc)
 198                 return 0;
 199         return htole32(SUSPEND_TIME_PERIOD);
 200 }
 201 #endif
 202
 203 static uint32_t
 204 iwm_mvm_scan_rate_n_flags(struct iwm_softc *sc, int flags, int no_cck)
 205 {
 206         uint32_t tx_ant;
 207         int i, ind;
 208
 209         for (i = 0, ind = sc->sc_scan_last_antenna;
 210             i < IWM_RATE_MCS_ANT_NUM; i++) {
 211                 ind = (ind + 1) % IWM_RATE_MCS_ANT_NUM;
 212                 if (iwm_fw_valid_tx_ant(sc) & (1 << ind)) {
 213                         sc->sc_scan_last_antenna = ind;
 214                         break;
 215                 }
 216         }
 217         tx_ant = (1 << sc->sc_scan_last_antenna) << IWM_RATE_MCS_ANT_POS;
 218
 219         if ((flags & IEEE80211_CHAN_2GHZ) && !no_cck)
 220                 return htole32(IWM_RATE_1M_PLCP | IWM_RATE_MCS_CCK_MSK |
 221                                    tx_ant);
 222         else
 223                 return htole32(IWM_RATE_6M_PLCP | tx_ant);
 224 }
 225
 226 #if 0
 227 /*
 228  * If req->n_ssids > 0, it means we should do an active scan.
 229  * In case of active scan w/o directed scan, we receive a zero-length SSID
 230  * just to notify that this scan is active and not passive.
 231  * In order to notify the FW of the number of SSIDs we wish to scan (including
 232  * the zero-length one), we need to set the corresponding bits in chan->type,
 233  * one for each SSID, and set the active bit (first). If the first SSID is
 234  * already included in the probe template, so we need to set only
 235  * req->n_ssids - 1 bits in addition to the first bit.
 236  */
 237 static uint16_t
 238 iwm_mvm_get_active_dwell(struct iwm_softc *sc, int flags, int n_ssids)
 239 {
 240         if (flags & IEEE80211_CHAN_2GHZ)
 241                 return 30  + 3 * (n_ssids + 1);
 242         return 20  + 2 * (n_ssids + 1);
 243 }
 244
 245 static uint16_t
 246 iwm_mvm_get_passive_dwell(struct iwm_softc *sc, int flags)
 247 {
 248         return (flags & IEEE80211_CHAN_2GHZ) ? 100 + 20 : 100 + 10;
 249 }
 250 #endif
 251
 252 static int
 253 iwm_mvm_scan_skip_channel(struct ieee80211_channel *c)
 254 {
 255         if (IEEE80211_IS_CHAN_2GHZ(c) && IEEE80211_IS_CHAN_B(c))
 256                 return 0;
 257         else if (IEEE80211_IS_CHAN_5GHZ(c) && IEEE80211_IS_CHAN_A(c))
 258                 return 0;
 259         else
 260                 return 1;
 261 }
 262
 263 static uint8_t
 264 iwm_mvm_lmac_scan_fill_channels(struct iwm_softc *sc,
 265     struct iwm_scan_channel_cfg_lmac *chan, int n_ssids)
 266 {
 267         struct ieee80211com *ic = &sc->sc_ic;
 268         struct ieee80211_scan_state *ss = ic->ic_scan;
 269         struct ieee80211_channel *c;
 270         uint8_t nchan;
 271         int j;
 272
 273         for (nchan = j = 0;
 274             j < ic->ic_nchans && nchan < sc->sc_capa_n_scan_channels; j++) {
 275                 c = &ic->ic_channels[j];
 276                 /* For 2GHz, only populate 11b channels */
 277                 /* For 5GHz, only populate 11a channels */
 278                 /*
 279                  * Catch other channels, in case we have 900MHz channels or
 280                  * something in the chanlist.
 281                  */
 282                 if (iwm_mvm_scan_skip_channel(c)) {
 283                         IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 284                             "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n",
 285                             __func__, c->ic_freq, c->ic_ieee, c->ic_flags);
 286                         continue;
 287                 }
 288
 289                 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 290                     "Adding channel %d (%d Mhz) to the list\n",
 291                     nchan, c->ic_freq);
 292                 chan->channel_num = htole16(ieee80211_mhz2ieee(c->ic_freq, 0));
 293                 chan->iter_count = htole16(1);
 294                 chan->iter_interval = htole32(0);
 295                 chan->flags = htole32(IWM_UNIFIED_SCAN_CHANNEL_PARTIAL);
 296                 chan->flags |= htole32(IWM_SCAN_CHANNEL_NSSIDS(n_ssids));
 297                 /* XXX IEEE80211_SCAN_NOBCAST flag is never set. */
 298                 if (!IEEE80211_IS_CHAN_PASSIVE(c) &&
 299                     (!(ss->ss_flags & IEEE80211_SCAN_NOBCAST) || n_ssids != 0))
 300                         chan->flags |= htole32(IWM_SCAN_CHANNEL_TYPE_ACTIVE);
 301                 chan++;
 302                 nchan++;
 303         }
 304
 305         return nchan;
 306 }
 307
 308 static uint8_t
 309 iwm_mvm_umac_scan_fill_channels(struct iwm_softc *sc,
 310     struct iwm_scan_channel_cfg_umac *chan, int n_ssids)
 311 {
 312         struct ieee80211com *ic = &sc->sc_ic;
 313         struct ieee80211_channel *c;
 314         uint8_t nchan;
 315         int j;
 316
 317         for (nchan = j = 0;
 318             j < ic->ic_nchans && nchan < sc->sc_capa_n_scan_channels; j++) {
 319                 c = &ic->ic_channels[j];
 320                 /* For 2GHz, only populate 11b channels */
 321                 /* For 5GHz, only populate 11a channels */
 322                 /*
 323                  * Catch other channels, in case we have 900MHz channels or
 324                  * something in the chanlist.
 325                  */
 326                 if (iwm_mvm_scan_skip_channel(c)) {
 327                         IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 328                             "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n",
 329                             __func__, c->ic_freq, c->ic_ieee, c->ic_flags);
 330                         continue;
 331                 }
 332
 333                 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 334                     "Adding channel %d (%d Mhz) to the list\n",
 335                     nchan, c->ic_freq);
 336                 chan->channel_num = ieee80211_mhz2ieee(c->ic_freq, 0);
 337                 chan->iter_count = 1;
 338                 chan->iter_interval = htole16(0);
 339                 chan->flags = htole32(IWM_SCAN_CHANNEL_UMAC_NSSIDS(n_ssids));
 340                 chan++;
 341                 nchan++;
 342         }
 343
 344         return nchan;
 345 }
 346
 347 static int
 348 iwm_mvm_fill_probe_req(struct iwm_softc *sc, struct iwm_scan_probe_req *preq)
 349 {
 350         struct ieee80211com *ic = &sc->sc_ic;
 351         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
 352         struct ieee80211_frame *wh = (struct ieee80211_frame *)preq->buf;
 353         struct ieee80211_rateset *rs;
 354         size_t remain = sizeof(preq->buf);
 355         uint8_t *frm, *pos;
 356
 357         memset(preq, 0, sizeof(*preq));
 358
 359         /* Ensure enough space for header and SSID IE. */
 360         if (remain < sizeof(*wh) + 2)
 361                 return ENOBUFS;
 362
 363         /*
 364          * Build a probe request frame.  Most of the following code is a
 365          * copy & paste of what is done in net80211.
 366          */
 367         wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
 368             IEEE80211_FC0_SUBTYPE_PROBE_REQ;
 369         wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
 370         IEEE80211_ADDR_COPY(wh->i_addr1, ieee80211broadcastaddr);
 371         IEEE80211_ADDR_COPY(wh->i_addr2, vap ? vap->iv_myaddr : ic->ic_macaddr);
 372         IEEE80211_ADDR_COPY(wh->i_addr3, ieee80211broadcastaddr);
 373         *(uint16_t *)&wh->i_dur[0] = 0; /* filled by HW */
 374         *(uint16_t *)&wh->i_seq[0] = 0; /* filled by HW */
 375
 376         frm = (uint8_t *)(wh + 1);
 377         frm = ieee80211_add_ssid(frm, NULL, 0);
 378
 379         /* Tell the firmware where the MAC header is. */
 380         preq->mac_header.offset = 0;
 381         preq->mac_header.len = htole16(frm - (uint8_t *)wh);
 382         remain -= frm - (uint8_t *)wh;
 383
 384         /* Fill in 2GHz IEs and tell firmware where they are. */
 385         rs = &ic->ic_sup_rates[IEEE80211_MODE_11G];
 386         if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
 387                 if (remain < 4 + rs->rs_nrates)
 388                         return ENOBUFS;
 389         } else if (remain < 2 + rs->rs_nrates) {
 390                 return ENOBUFS;
 391         }
 392         preq->band_data[0].offset = htole16(frm - (uint8_t *)wh);
 393         pos = frm;
 394         frm = ieee80211_add_rates(frm, rs);
 395         if (rs->rs_nrates > IEEE80211_RATE_SIZE)
 396                 frm = ieee80211_add_xrates(frm, rs);
 397         preq->band_data[0].len = htole16(frm - pos);
 398         remain -= frm - pos;
 399
 400         if (isset(sc->sc_enabled_capa,
 401             IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)) {
 402                 if (remain < 3)
 403                         return ENOBUFS;
 404                 *frm++ = IEEE80211_ELEMID_DSPARMS;
 405                 *frm++ = 1;
 406                 *frm++ = 0;
 407                 remain -= 3;
 408         }
 409
 410         if (sc->sc_nvm.sku_cap_band_52GHz_enable) {
 411                 /* Fill in 5GHz IEs. */
 412                 rs = &ic->ic_sup_rates[IEEE80211_MODE_11A];
 413                 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
 414                         if (remain < 4 + rs->rs_nrates)
 415                                 return ENOBUFS;
 416                 } else if (remain < 2 + rs->rs_nrates) {
 417                         return ENOBUFS;
 418                 }
 419                 preq->band_data[1].offset = htole16(frm - (uint8_t *)wh);
 420                 pos = frm;
 421                 frm = ieee80211_add_rates(frm, rs);
 422                 if (rs->rs_nrates > IEEE80211_RATE_SIZE)
 423                         frm = ieee80211_add_xrates(frm, rs);
 424                 preq->band_data[1].len = htole16(frm - pos);
 425                 remain -= frm - pos;
 426         }
 427
 428         /* Send 11n IEs on both 2GHz and 5GHz bands. */
 429         preq->common_data.offset = htole16(frm - (uint8_t *)wh);
 430         pos = frm;
 431 #if 0
 432         if (ic->ic_flags & IEEE80211_F_HTON) {
 433                 if (remain < 28)
 434                         return ENOBUFS;
 435                 frm = ieee80211_add_htcaps(frm, ic);
 436                 /* XXX add WME info? */
 437         }
 438 #endif
 439         preq->common_data.len = htole16(frm - pos);
 440
 441         return 0;
 442 }
 443
 444 int
 445 iwm_mvm_config_umac_scan(struct iwm_softc *sc)
 446 {
 447         struct ieee80211com *ic = &sc->sc_ic;
 448         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
 449
 450         struct iwm_scan_config *scan_config;
 451         int ret, j, nchan;
 452         size_t cmd_size;
 453         struct ieee80211_channel *c;
 454         struct iwm_host_cmd hcmd = {
 455                 .id = iwm_cmd_id(IWM_SCAN_CFG_CMD, IWM_ALWAYS_LONG_GROUP, 0),
 456                 .flags = IWM_CMD_SYNC,
 457         };
 458         static const uint32_t rates = (IWM_SCAN_CONFIG_RATE_1M |
 459             IWM_SCAN_CONFIG_RATE_2M | IWM_SCAN_CONFIG_RATE_5M |
 460             IWM_SCAN_CONFIG_RATE_11M | IWM_SCAN_CONFIG_RATE_6M |
 461             IWM_SCAN_CONFIG_RATE_9M | IWM_SCAN_CONFIG_RATE_12M |
 462             IWM_SCAN_CONFIG_RATE_18M | IWM_SCAN_CONFIG_RATE_24M |
 463             IWM_SCAN_CONFIG_RATE_36M | IWM_SCAN_CONFIG_RATE_48M |
 464             IWM_SCAN_CONFIG_RATE_54M);
 465
 466         cmd_size = sizeof(*scan_config) + sc->sc_capa_n_scan_channels;
 467
 468         scan_config = malloc(cmd_size, M_DEVBUF, M_NOWAIT | M_ZERO);
 469         if (scan_config == NULL)
 470                 return ENOMEM;
 471
 472         scan_config->tx_chains = htole32(iwm_fw_valid_tx_ant(sc));
 473         scan_config->rx_chains = htole32(iwm_fw_valid_rx_ant(sc));
 474         scan_config->legacy_rates = htole32(rates |
 475             IWM_SCAN_CONFIG_SUPPORTED_RATE(rates));
 476
 477         /* These timings correspond to iwlwifi's UNASSOC scan. */
 478         scan_config->dwell_active = 10;
 479         scan_config->dwell_passive = 110;
 480         scan_config->dwell_fragmented = 44;
 481         scan_config->dwell_extended = 90;
 482         scan_config->out_of_channel_time = htole32(0);
 483         scan_config->suspend_time = htole32(0);
 484
 485         IEEE80211_ADDR_COPY(scan_config->mac_addr,
 486             vap ? vap->iv_myaddr : ic->ic_macaddr);
 487
 488         scan_config->bcast_sta_id = sc->sc_aux_sta.sta_id;
 489         scan_config->channel_flags = IWM_CHANNEL_FLAG_EBS |
 490             IWM_CHANNEL_FLAG_ACCURATE_EBS | IWM_CHANNEL_FLAG_EBS_ADD |
 491             IWM_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
 492
 493         for (nchan = j = 0;
 494             j < ic->ic_nchans && nchan < sc->sc_capa_n_scan_channels; j++) {
 495                 c = &ic->ic_channels[j];
 496                 /* For 2GHz, only populate 11b channels */
 497                 /* For 5GHz, only populate 11a channels */
 498                 /*
 499                  * Catch other channels, in case we have 900MHz channels or
 500                  * something in the chanlist.
 501                  */
 502                 if (iwm_mvm_scan_skip_channel(c))
 503                         continue;
 504                 scan_config->channel_array[nchan++] =
 505                     ieee80211_mhz2ieee(c->ic_freq, 0);
 506         }
 507
 508         scan_config->flags = htole32(IWM_SCAN_CONFIG_FLAG_ACTIVATE |
 509             IWM_SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
 510             IWM_SCAN_CONFIG_FLAG_SET_TX_CHAINS |
 511             IWM_SCAN_CONFIG_FLAG_SET_RX_CHAINS |
 512             IWM_SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
 513             IWM_SCAN_CONFIG_FLAG_SET_ALL_TIMES |
 514             IWM_SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
 515             IWM_SCAN_CONFIG_FLAG_SET_MAC_ADDR |
 516             IWM_SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
 517             IWM_SCAN_CONFIG_N_CHANNELS(nchan) |
 518             IWM_SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
 519
 520         hcmd.data[0] = scan_config;
 521         hcmd.len[0] = cmd_size;
 522
 523         IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending UMAC scan config\n");
 524
 525         ret = iwm_send_cmd(sc, &hcmd);
 526         if (!ret)
 527                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 528                     "UMAC scan config was sent successfully\n");
 529
 530         free(scan_config, M_DEVBUF);
 531         return ret;
 532 }
 533
 534 int
 535 iwm_mvm_umac_scan(struct iwm_softc *sc)
 536 {
 537         struct iwm_host_cmd hcmd = {
 538                 .id = iwm_cmd_id(IWM_SCAN_REQ_UMAC, IWM_ALWAYS_LONG_GROUP, 0),
 539                 .len = { 0, },
 540                 .data = { NULL, },
 541                 .flags = IWM_CMD_SYNC,
 542         };
 543         struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan;
 544         struct iwm_scan_req_umac *req;
 545         struct iwm_scan_req_umac_tail *tail;
 546         size_t req_len;
 547         uint8_t i, nssid;
 548         int ret;
 549
 550         req_len = sizeof(struct iwm_scan_req_umac) +
 551             (sizeof(struct iwm_scan_channel_cfg_umac) *
 552             sc->sc_capa_n_scan_channels) +
 553             sizeof(struct iwm_scan_req_umac_tail);
 554         if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE)
 555                 return ENOMEM;
 556         req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO);
 557         if (req == NULL)
 558                 return ENOMEM;
 559
 560         hcmd.len[0] = (uint16_t)req_len;
 561         hcmd.data[0] = (void *)req;
 562
 563         IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Handling ieee80211 scan request\n");
 564
 565         /* These timings correspond to iwlwifi's UNASSOC scan. */
 566         req->active_dwell = 10;
 567         req->passive_dwell = 110;
 568         req->fragmented_dwell = 44;
 569         req->extended_dwell = 90;
 570         req->max_out_time = 0;
 571         req->suspend_time = 0;
 572
 573         req->scan_priority = htole32(IWM_SCAN_PRIORITY_HIGH);
 574         req->ooc_priority = htole32(IWM_SCAN_PRIORITY_HIGH);
 575
 576         nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX);
 577         req->n_channels = iwm_mvm_umac_scan_fill_channels(sc,
 578             (struct iwm_scan_channel_cfg_umac *)req->data, nssid);
 579
 580         req->general_flags = htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASS_ALL |
 581             IWM_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE |
 582             IWM_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL);
 583
 584         tail = (void *)((char *)&req->data +
 585                 sizeof(struct iwm_scan_channel_cfg_umac) *
 586                         sc->sc_capa_n_scan_channels);
 587
 588         /* Check if we're doing an active directed scan. */
 589         for (i = 0; i < nssid; i++) {
 590                 tail->direct_scan[i].id = IEEE80211_ELEMID_SSID;
 591                 tail->direct_scan[i].len = MIN(ss->ss_ssid[i].len,
 592                     IEEE80211_NWID_LEN);
 593                 memcpy(tail->direct_scan[i].ssid, ss->ss_ssid[i].ssid,
 594                     tail->direct_scan[i].len);
 595                 /* XXX debug */
 596         }
 597         if (nssid != 0) {
 598                 req->general_flags |=
 599                     htole32(IWM_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT);
 600         } else
 601                 req->general_flags |= htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASSIVE);
 602
 603         if (isset(sc->sc_enabled_capa,
 604             IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 605                 req->general_flags |=
 606                     htole32(IWM_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED);
 607
 608         ret = iwm_mvm_fill_probe_req(sc, &tail->preq);
 609         if (ret) {
 610                 free(req, M_DEVBUF);
 611                 return ret;
 612         }
 613
 614         /* Specify the scan plan: We'll do one iteration. */
 615         tail->schedule[0].interval = 0;
 616         tail->schedule[0].iter_count = 1;
 617
 618         ret = iwm_send_cmd(sc, &hcmd);
 619         if (!ret)
 620                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 621                     "Scan request was sent successfully\n");
 622         free(req, M_DEVBUF);
 623         return ret;
 624 }
 625
 626 int
 627 iwm_mvm_lmac_scan(struct iwm_softc *sc)
 628 {
 629         struct iwm_host_cmd hcmd = {
 630                 .id = IWM_SCAN_OFFLOAD_REQUEST_CMD,
 631                 .len = { 0, },
 632                 .data = { NULL, },
 633                 .flags = IWM_CMD_SYNC,
 634         };
 635         struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan;
 636         struct iwm_scan_req_lmac *req;
 637         size_t req_len;
 638         uint8_t i, nssid;
 639         int ret;
 640
 641         IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 642             "Handling ieee80211 scan request\n");
 643
 644         req_len = sizeof(struct iwm_scan_req_lmac) +
 645             (sizeof(struct iwm_scan_channel_cfg_lmac) *
 646             sc->sc_capa_n_scan_channels) + sizeof(struct iwm_scan_probe_req);
 647         if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE)
 648                 return ENOMEM;
 649         req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO);
 650         if (req == NULL)
 651                 return ENOMEM;
 652
 653         hcmd.len[0] = (uint16_t)req_len;
 654         hcmd.data[0] = (void *)req;
 655
 656         /* These timings correspond to iwlwifi's UNASSOC scan. */
 657         req->active_dwell = 10;
 658         req->passive_dwell = 110;
 659         req->fragmented_dwell = 44;
 660         req->extended_dwell = 90;
 661         req->max_out_time = 0;
 662         req->suspend_time = 0;
 663
 664         req->scan_prio = htole32(IWM_SCAN_PRIORITY_HIGH);
 665         req->rx_chain_select = iwm_mvm_scan_rx_chain(sc);
 666         req->iter_num = htole32(1);
 667         req->delay = 0;
 668
 669         req->scan_flags = htole32(IWM_MVM_LMAC_SCAN_FLAG_PASS_ALL |
 670             IWM_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE |
 671             IWM_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL);
 672         if (isset(sc->sc_enabled_capa,
 673             IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 674                 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
 675
 676         req->flags = htole32(IWM_PHY_BAND_24);
 677         if (sc->sc_nvm.sku_cap_band_52GHz_enable)
 678                 req->flags |= htole32(IWM_PHY_BAND_5);
 679         req->filter_flags =
 680             htole32(IWM_MAC_FILTER_ACCEPT_GRP | IWM_MAC_FILTER_IN_BEACON);
 681
 682         /* Tx flags 2 GHz. */
 683         req->tx_cmd[0].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL |
 684             IWM_TX_CMD_FLG_BT_DIS);
 685         req->tx_cmd[0].rate_n_flags =
 686             iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_2GHZ, 1/*XXX*/);
 687         req->tx_cmd[0].sta_id = sc->sc_aux_sta.sta_id;
 688
 689         /* Tx flags 5 GHz. */
 690         req->tx_cmd[1].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL |
 691             IWM_TX_CMD_FLG_BT_DIS);
 692         req->tx_cmd[1].rate_n_flags =
 693             iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_5GHZ, 1/*XXX*/);
 694         req->tx_cmd[1].sta_id = sc->sc_aux_sta.sta_id;
 695
 696         /* Check if we're doing an active directed scan. */
 697         nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX);
 698         for (i = 0; i < nssid; i++) {
 699                 req->direct_scan[i].id = IEEE80211_ELEMID_SSID;
 700                 req->direct_scan[i].len = MIN(ss->ss_ssid[i].len,
 701                     IEEE80211_NWID_LEN);
 702                 memcpy(req->direct_scan[i].ssid, ss->ss_ssid[i].ssid,
 703                     req->direct_scan[i].len);
 704                 /* XXX debug */
 705         }
 706         if (nssid != 0) {
 707                 req->scan_flags |=
 708                     htole32(IWM_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION);
 709         } else
 710                 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAG_PASSIVE);
 711
 712         req->n_channels = iwm_mvm_lmac_scan_fill_channels(sc,
 713             (struct iwm_scan_channel_cfg_lmac *)req->data, nssid);
 714
 715         ret = iwm_mvm_fill_probe_req(sc,
 716                             (struct iwm_scan_probe_req *)(req->data +
 717                             (sizeof(struct iwm_scan_channel_cfg_lmac) *
 718                             sc->sc_capa_n_scan_channels)));
 719         if (ret) {
 720                 free(req, M_DEVBUF);
 721                 return ret;
 722         }
 723
 724         /* Specify the scan plan: We'll do one iteration. */
 725         req->schedule[0].iterations = 1;
 726         req->schedule[0].full_scan_mul = 1;
 727
 728         /* Disable EBS. */
 729         req->channel_opt[0].non_ebs_ratio = 1;
 730         req->channel_opt[1].non_ebs_ratio = 1;
 731
 732         ret = iwm_send_cmd(sc, &hcmd);
 733         if (!ret) {
 734                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 735                     "Scan request was sent successfully\n");
 736         }
 737         free(req, M_DEVBUF);
 738         return ret;
 739 }