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_notif_wait.h>
 157 #include <dev/iwm/if_iwm_util.h>
 158 #include <dev/iwm/if_iwm_scan.h>
 159
 160 /*
 161  * BEGIN mvm/scan.c
 162  */
 163
 164 #define IWM_PLCP_QUIET_THRESH 1
 165 #define IWM_ACTIVE_QUIET_TIME 10
 166 #define LONG_OUT_TIME_PERIOD (600 * IEEE80211_DUR_TU)
 167 #define SHORT_OUT_TIME_PERIOD (200 * IEEE80211_DUR_TU)
 168 #define SUSPEND_TIME_PERIOD (100 * IEEE80211_DUR_TU)
 169
 170 static uint16_t
 171 iwm_mvm_scan_rx_chain(struct iwm_softc *sc)
 172 {
 173         uint16_t rx_chain;
 174         uint8_t rx_ant;
 175
 176         rx_ant = iwm_mvm_get_valid_rx_ant(sc);
 177         rx_chain = rx_ant << IWM_PHY_RX_CHAIN_VALID_POS;
 178         rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
 179         rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_SEL_POS;
 180         rx_chain |= 0x1 << IWM_PHY_RX_CHAIN_DRIVER_FORCE_POS;
 181         return htole16(rx_chain);
 182 }
 183
 184 #if 0
 185 static uint32_t
 186 iwm_mvm_scan_max_out_time(struct iwm_softc *sc, uint32_t flags, int is_assoc)
 187 {
 188         if (!is_assoc)
 189                 return 0;
 190         if (flags & 0x1)
 191                 return htole32(SHORT_OUT_TIME_PERIOD);
 192         return htole32(LONG_OUT_TIME_PERIOD);
 193 }
 194
 195 static uint32_t
 196 iwm_mvm_scan_suspend_time(struct iwm_softc *sc, int is_assoc)
 197 {
 198         if (!is_assoc)
 199                 return 0;
 200         return htole32(SUSPEND_TIME_PERIOD);
 201 }
 202 #endif
 203
 204 static uint32_t
 205 iwm_mvm_scan_rate_n_flags(struct iwm_softc *sc, int flags, int no_cck)
 206 {
 207         uint32_t tx_ant;
 208         int i, ind;
 209
 210         for (i = 0, ind = sc->sc_scan_last_antenna;
 211             i < IWM_RATE_MCS_ANT_NUM; i++) {
 212                 ind = (ind + 1) % IWM_RATE_MCS_ANT_NUM;
 213                 if (iwm_mvm_get_valid_tx_ant(sc) & (1 << ind)) {
 214                         sc->sc_scan_last_antenna = ind;
 215                         break;
 216                 }
 217         }
 218         tx_ant = (1 << sc->sc_scan_last_antenna) << IWM_RATE_MCS_ANT_POS;
 219
 220         if ((flags & IEEE80211_CHAN_2GHZ) && !no_cck)
 221                 return htole32(IWM_RATE_1M_PLCP | IWM_RATE_MCS_CCK_MSK |
 222                                    tx_ant);
 223         else
 224                 return htole32(IWM_RATE_6M_PLCP | tx_ant);
 225 }
 226
 227 #if 0
 228 /*
 229  * If req->n_ssids > 0, it means we should do an active scan.
 230  * In case of active scan w/o directed scan, we receive a zero-length SSID
 231  * just to notify that this scan is active and not passive.
 232  * In order to notify the FW of the number of SSIDs we wish to scan (including
 233  * the zero-length one), we need to set the corresponding bits in chan->type,
 234  * one for each SSID, and set the active bit (first). If the first SSID is
 235  * already included in the probe template, so we need to set only
 236  * req->n_ssids - 1 bits in addition to the first bit.
 237  */
 238 static uint16_t
 239 iwm_mvm_get_active_dwell(struct iwm_softc *sc, int flags, int n_ssids)
 240 {
 241         if (flags & IEEE80211_CHAN_2GHZ)
 242                 return 30  + 3 * (n_ssids + 1);
 243         return 20  + 2 * (n_ssids + 1);
 244 }
 245
 246 static uint16_t
 247 iwm_mvm_get_passive_dwell(struct iwm_softc *sc, int flags)
 248 {
 249         return (flags & IEEE80211_CHAN_2GHZ) ? 100 + 20 : 100 + 10;
 250 }
 251 #endif
 252
 253 static int
 254 iwm_mvm_scan_skip_channel(struct ieee80211_channel *c)
 255 {
 256         if (IEEE80211_IS_CHAN_2GHZ(c) && IEEE80211_IS_CHAN_B(c))
 257                 return 0;
 258         else if (IEEE80211_IS_CHAN_5GHZ(c) && IEEE80211_IS_CHAN_A(c))
 259                 return 0;
 260         else
 261                 return 1;
 262 }
 263
 264 static uint8_t
 265 iwm_mvm_lmac_scan_fill_channels(struct iwm_softc *sc,
 266     struct iwm_scan_channel_cfg_lmac *chan, int n_ssids)
 267 {
 268         struct ieee80211com *ic = &sc->sc_ic;
 269         struct ieee80211_scan_state *ss = ic->ic_scan;
 270         struct ieee80211_channel *c;
 271         uint8_t nchan;
 272         int j;
 273
 274         for (nchan = j = 0;
 275             j < ic->ic_nchans && nchan < sc->sc_capa_n_scan_channels; j++) {
 276                 c = &ic->ic_channels[j];
 277                 /* For 2GHz, only populate 11b channels */
 278                 /* For 5GHz, only populate 11a channels */
 279                 /*
 280                  * Catch other channels, in case we have 900MHz channels or
 281                  * something in the chanlist.
 282                  */
 283                 if (iwm_mvm_scan_skip_channel(c)) {
 284                         IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 285                             "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n",
 286                             __func__, c->ic_freq, c->ic_ieee, c->ic_flags);
 287                         continue;
 288                 }
 289
 290                 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 291                     "Adding channel %d (%d Mhz) to the list\n",
 292                     nchan, c->ic_freq);
 293                 chan->channel_num = htole16(ieee80211_mhz2ieee(c->ic_freq, 0));
 294                 chan->iter_count = htole16(1);
 295                 chan->iter_interval = htole32(0);
 296                 chan->flags = htole32(IWM_UNIFIED_SCAN_CHANNEL_PARTIAL);
 297                 chan->flags |= htole32(IWM_SCAN_CHANNEL_NSSIDS(n_ssids));
 298                 /* XXX IEEE80211_SCAN_NOBCAST flag is never set. */
 299                 if (!IEEE80211_IS_CHAN_PASSIVE(c) &&
 300                     (!(ss->ss_flags & IEEE80211_SCAN_NOBCAST) || n_ssids != 0))
 301                         chan->flags |= htole32(IWM_SCAN_CHANNEL_TYPE_ACTIVE);
 302                 chan++;
 303                 nchan++;
 304         }
 305
 306         return nchan;
 307 }
 308
 309 static uint8_t
 310 iwm_mvm_umac_scan_fill_channels(struct iwm_softc *sc,
 311     struct iwm_scan_channel_cfg_umac *chan, int n_ssids)
 312 {
 313         struct ieee80211com *ic = &sc->sc_ic;
 314         struct ieee80211_channel *c;
 315         uint8_t nchan;
 316         int j;
 317
 318         for (nchan = j = 0;
 319             j < ic->ic_nchans && nchan < sc->sc_capa_n_scan_channels; j++) {
 320                 c = &ic->ic_channels[j];
 321                 /* For 2GHz, only populate 11b channels */
 322                 /* For 5GHz, only populate 11a channels */
 323                 /*
 324                  * Catch other channels, in case we have 900MHz channels or
 325                  * something in the chanlist.
 326                  */
 327                 if (iwm_mvm_scan_skip_channel(c)) {
 328                         IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 329                             "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n",
 330                             __func__, c->ic_freq, c->ic_ieee, c->ic_flags);
 331                         continue;
 332                 }
 333
 334                 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 335                     "Adding channel %d (%d Mhz) to the list\n",
 336                     nchan, c->ic_freq);
 337                 chan->channel_num = ieee80211_mhz2ieee(c->ic_freq, 0);
 338                 chan->iter_count = 1;
 339                 chan->iter_interval = htole16(0);
 340                 chan->flags = htole32(IWM_SCAN_CHANNEL_UMAC_NSSIDS(n_ssids));
 341                 chan++;
 342                 nchan++;
 343         }
 344
 345         return nchan;
 346 }
 347
 348 static int
 349 iwm_mvm_fill_probe_req(struct iwm_softc *sc, struct iwm_scan_probe_req *preq)
 350 {
 351         struct ieee80211com *ic = &sc->sc_ic;
 352         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
 353         struct ieee80211_frame *wh = (struct ieee80211_frame *)preq->buf;
 354         struct ieee80211_rateset *rs;
 355         size_t remain = sizeof(preq->buf);
 356         uint8_t *frm, *pos;
 357
 358         memset(preq, 0, sizeof(*preq));
 359
 360         /* Ensure enough space for header and SSID IE. */
 361         if (remain < sizeof(*wh) + 2)
 362                 return ENOBUFS;
 363
 364         /*
 365          * Build a probe request frame.  Most of the following code is a
 366          * copy & paste of what is done in net80211.
 367          */
 368         wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
 369             IEEE80211_FC0_SUBTYPE_PROBE_REQ;
 370         wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
 371         IEEE80211_ADDR_COPY(wh->i_addr1, ieee80211broadcastaddr);
 372         IEEE80211_ADDR_COPY(wh->i_addr2, vap ? vap->iv_myaddr : ic->ic_macaddr);
 373         IEEE80211_ADDR_COPY(wh->i_addr3, ieee80211broadcastaddr);
 374         *(uint16_t *)&wh->i_dur[0] = 0; /* filled by HW */
 375         *(uint16_t *)&wh->i_seq[0] = 0; /* filled by HW */
 376
 377         frm = (uint8_t *)(wh + 1);
 378         frm = ieee80211_add_ssid(frm, NULL, 0);
 379
 380         /* Tell the firmware where the MAC header is. */
 381         preq->mac_header.offset = 0;
 382         preq->mac_header.len = htole16(frm - (uint8_t *)wh);
 383         remain -= frm - (uint8_t *)wh;
 384
 385         /* Fill in 2GHz IEs and tell firmware where they are. */
 386         rs = &ic->ic_sup_rates[IEEE80211_MODE_11G];
 387         if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
 388                 if (remain < 4 + rs->rs_nrates)
 389                         return ENOBUFS;
 390         } else if (remain < 2 + rs->rs_nrates) {
 391                 return ENOBUFS;
 392         }
 393         preq->band_data[0].offset = htole16(frm - (uint8_t *)wh);
 394         pos = frm;
 395         frm = ieee80211_add_rates(frm, rs);
 396         if (rs->rs_nrates > IEEE80211_RATE_SIZE)
 397                 frm = ieee80211_add_xrates(frm, rs);
 398         preq->band_data[0].len = htole16(frm - pos);
 399         remain -= frm - pos;
 400
 401         if (isset(sc->sc_enabled_capa,
 402             IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)) {
 403                 if (remain < 3)
 404                         return ENOBUFS;
 405                 *frm++ = IEEE80211_ELEMID_DSPARMS;
 406                 *frm++ = 1;
 407                 *frm++ = 0;
 408                 remain -= 3;
 409         }
 410
 411         if (sc->nvm_data->sku_cap_band_52GHz_enable) {
 412                 /* Fill in 5GHz IEs. */
 413                 rs = &ic->ic_sup_rates[IEEE80211_MODE_11A];
 414                 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
 415                         if (remain < 4 + rs->rs_nrates)
 416                                 return ENOBUFS;
 417                 } else if (remain < 2 + rs->rs_nrates) {
 418                         return ENOBUFS;
 419                 }
 420                 preq->band_data[1].offset = htole16(frm - (uint8_t *)wh);
 421                 pos = frm;
 422                 frm = ieee80211_add_rates(frm, rs);
 423                 if (rs->rs_nrates > IEEE80211_RATE_SIZE)
 424                         frm = ieee80211_add_xrates(frm, rs);
 425                 preq->band_data[1].len = htole16(frm - pos);
 426                 remain -= frm - pos;
 427         }
 428
 429         /* Send 11n IEs on both 2GHz and 5GHz bands. */
 430         preq->common_data.offset = htole16(frm - (uint8_t *)wh);
 431         pos = frm;
 432 #if 0
 433         if (ic->ic_flags & IEEE80211_F_HTON) {
 434                 if (remain < 28)
 435                         return ENOBUFS;
 436                 frm = ieee80211_add_htcaps(frm, ic);
 437                 /* XXX add WME info? */
 438         }
 439 #endif
 440         preq->common_data.len = htole16(frm - pos);
 441
 442         return 0;
 443 }
 444
 445 int
 446 iwm_mvm_config_umac_scan(struct iwm_softc *sc)
 447 {
 448         struct ieee80211com *ic = &sc->sc_ic;
 449         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
 450
 451         struct iwm_scan_config *scan_config;
 452         int ret, j, nchan;
 453         size_t cmd_size;
 454         struct ieee80211_channel *c;
 455         struct iwm_host_cmd hcmd = {
 456                 .id = iwm_cmd_id(IWM_SCAN_CFG_CMD, IWM_ALWAYS_LONG_GROUP, 0),
 457                 .flags = IWM_CMD_SYNC,
 458         };
 459         static const uint32_t rates = (IWM_SCAN_CONFIG_RATE_1M |
 460             IWM_SCAN_CONFIG_RATE_2M | IWM_SCAN_CONFIG_RATE_5M |
 461             IWM_SCAN_CONFIG_RATE_11M | IWM_SCAN_CONFIG_RATE_6M |
 462             IWM_SCAN_CONFIG_RATE_9M | IWM_SCAN_CONFIG_RATE_12M |
 463             IWM_SCAN_CONFIG_RATE_18M | IWM_SCAN_CONFIG_RATE_24M |
 464             IWM_SCAN_CONFIG_RATE_36M | IWM_SCAN_CONFIG_RATE_48M |
 465             IWM_SCAN_CONFIG_RATE_54M);
 466
 467         cmd_size = sizeof(*scan_config) + sc->sc_capa_n_scan_channels;
 468
 469         scan_config = malloc(cmd_size, M_DEVBUF, M_NOWAIT | M_ZERO);
 470         if (scan_config == NULL)
 471                 return ENOMEM;
 472
 473         scan_config->tx_chains = htole32(iwm_mvm_get_valid_tx_ant(sc));
 474         scan_config->rx_chains = htole32(iwm_mvm_get_valid_rx_ant(sc));
 475         scan_config->legacy_rates = htole32(rates |
 476             IWM_SCAN_CONFIG_SUPPORTED_RATE(rates));
 477
 478         /* These timings correspond to iwlwifi's UNASSOC scan. */
 479         scan_config->dwell_active = 10;
 480         scan_config->dwell_passive = 110;
 481         scan_config->dwell_fragmented = 44;
 482         scan_config->dwell_extended = 90;
 483         scan_config->out_of_channel_time = htole32(0);
 484         scan_config->suspend_time = htole32(0);
 485
 486         IEEE80211_ADDR_COPY(scan_config->mac_addr,
 487             vap ? vap->iv_myaddr : ic->ic_macaddr);
 488
 489         scan_config->bcast_sta_id = sc->sc_aux_sta.sta_id;
 490         scan_config->channel_flags = IWM_CHANNEL_FLAG_EBS |
 491             IWM_CHANNEL_FLAG_ACCURATE_EBS | IWM_CHANNEL_FLAG_EBS_ADD |
 492             IWM_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
 493
 494         for (nchan = j = 0;
 495             j < ic->ic_nchans && nchan < sc->sc_capa_n_scan_channels; j++) {
 496                 c = &ic->ic_channels[j];
 497                 /* For 2GHz, only populate 11b channels */
 498                 /* For 5GHz, only populate 11a channels */
 499                 /*
 500                  * Catch other channels, in case we have 900MHz channels or
 501                  * something in the chanlist.
 502                  */
 503                 if (iwm_mvm_scan_skip_channel(c))
 504                         continue;
 505                 scan_config->channel_array[nchan++] =
 506                     ieee80211_mhz2ieee(c->ic_freq, 0);
 507         }
 508
 509         scan_config->flags = htole32(IWM_SCAN_CONFIG_FLAG_ACTIVATE |
 510             IWM_SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
 511             IWM_SCAN_CONFIG_FLAG_SET_TX_CHAINS |
 512             IWM_SCAN_CONFIG_FLAG_SET_RX_CHAINS |
 513             IWM_SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
 514             IWM_SCAN_CONFIG_FLAG_SET_ALL_TIMES |
 515             IWM_SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
 516             IWM_SCAN_CONFIG_FLAG_SET_MAC_ADDR |
 517             IWM_SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
 518             IWM_SCAN_CONFIG_N_CHANNELS(nchan) |
 519             IWM_SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
 520
 521         hcmd.data[0] = scan_config;
 522         hcmd.len[0] = cmd_size;
 523
 524         IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending UMAC scan config\n");
 525
 526         ret = iwm_send_cmd(sc, &hcmd);
 527         if (!ret)
 528                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 529                     "UMAC scan config was sent successfully\n");
 530
 531         free(scan_config, M_DEVBUF);
 532         return ret;
 533 }
 534
 535 int
 536 iwm_mvm_umac_scan(struct iwm_softc *sc)
 537 {
 538         struct iwm_host_cmd hcmd = {
 539                 .id = iwm_cmd_id(IWM_SCAN_REQ_UMAC, IWM_ALWAYS_LONG_GROUP, 0),
 540                 .len = { 0, },
 541                 .data = { NULL, },
 542                 .flags = IWM_CMD_SYNC,
 543         };
 544         struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan;
 545         struct iwm_scan_req_umac *req;
 546         struct iwm_scan_req_umac_tail *tail;
 547         size_t req_len;
 548         uint8_t i, nssid;
 549         int ret;
 550
 551         req_len = sizeof(struct iwm_scan_req_umac) +
 552             (sizeof(struct iwm_scan_channel_cfg_umac) *
 553             sc->sc_capa_n_scan_channels) +
 554             sizeof(struct iwm_scan_req_umac_tail);
 555         if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE)
 556                 return ENOMEM;
 557         req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO);
 558         if (req == NULL)
 559                 return ENOMEM;
 560
 561         hcmd.len[0] = (uint16_t)req_len;
 562         hcmd.data[0] = (void *)req;
 563
 564         IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Handling ieee80211 scan request\n");
 565
 566         /* These timings correspond to iwlwifi's UNASSOC scan. */
 567         req->active_dwell = 10;
 568         req->passive_dwell = 110;
 569         req->fragmented_dwell = 44;
 570         req->extended_dwell = 90;
 571         req->max_out_time = 0;
 572         req->suspend_time = 0;
 573
 574         req->scan_priority = htole32(IWM_SCAN_PRIORITY_HIGH);
 575         req->ooc_priority = htole32(IWM_SCAN_PRIORITY_HIGH);
 576
 577         nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX);
 578         req->n_channels = iwm_mvm_umac_scan_fill_channels(sc,
 579             (struct iwm_scan_channel_cfg_umac *)req->data, nssid);
 580
 581         req->general_flags = htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASS_ALL |
 582             IWM_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE |
 583             IWM_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL);
 584
 585         tail = (void *)((char *)&req->data +
 586                 sizeof(struct iwm_scan_channel_cfg_umac) *
 587                         sc->sc_capa_n_scan_channels);
 588
 589         /* Check if we're doing an active directed scan. */
 590         for (i = 0; i < nssid; i++) {
 591                 tail->direct_scan[i].id = IEEE80211_ELEMID_SSID;
 592                 tail->direct_scan[i].len = MIN(ss->ss_ssid[i].len,
 593                     IEEE80211_NWID_LEN);
 594                 memcpy(tail->direct_scan[i].ssid, ss->ss_ssid[i].ssid,
 595                     tail->direct_scan[i].len);
 596                 /* XXX debug */
 597         }
 598         if (nssid != 0) {
 599                 req->general_flags |=
 600                     htole32(IWM_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT);
 601         } else
 602                 req->general_flags |= htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASSIVE);
 603
 604         if (isset(sc->sc_enabled_capa,
 605             IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 606                 req->general_flags |=
 607                     htole32(IWM_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED);
 608
 609         ret = iwm_mvm_fill_probe_req(sc, &tail->preq);
 610         if (ret) {
 611                 free(req, M_DEVBUF);
 612                 return ret;
 613         }
 614
 615         /* Specify the scan plan: We'll do one iteration. */
 616         tail->schedule[0].interval = 0;
 617         tail->schedule[0].iter_count = 1;
 618
 619         ret = iwm_send_cmd(sc, &hcmd);
 620         if (!ret)
 621                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 622                     "Scan request was sent successfully\n");
 623         free(req, M_DEVBUF);
 624         return ret;
 625 }
 626
 627 int
 628 iwm_mvm_lmac_scan(struct iwm_softc *sc)
 629 {
 630         struct iwm_host_cmd hcmd = {
 631                 .id = IWM_SCAN_OFFLOAD_REQUEST_CMD,
 632                 .len = { 0, },
 633                 .data = { NULL, },
 634                 .flags = IWM_CMD_SYNC,
 635         };
 636         struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan;
 637         struct iwm_scan_req_lmac *req;
 638         size_t req_len;
 639         uint8_t i, nssid;
 640         int ret;
 641
 642         IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 643             "Handling ieee80211 scan request\n");
 644
 645         req_len = sizeof(struct iwm_scan_req_lmac) +
 646             (sizeof(struct iwm_scan_channel_cfg_lmac) *
 647             sc->sc_capa_n_scan_channels) + sizeof(struct iwm_scan_probe_req);
 648         if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE)
 649                 return ENOMEM;
 650         req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO);
 651         if (req == NULL)
 652                 return ENOMEM;
 653
 654         hcmd.len[0] = (uint16_t)req_len;
 655         hcmd.data[0] = (void *)req;
 656
 657         /* These timings correspond to iwlwifi's UNASSOC scan. */
 658         req->active_dwell = 10;
 659         req->passive_dwell = 110;
 660         req->fragmented_dwell = 44;
 661         req->extended_dwell = 90;
 662         req->max_out_time = 0;
 663         req->suspend_time = 0;
 664
 665         req->scan_prio = htole32(IWM_SCAN_PRIORITY_HIGH);
 666         req->rx_chain_select = iwm_mvm_scan_rx_chain(sc);
 667         req->iter_num = htole32(1);
 668         req->delay = 0;
 669
 670         req->scan_flags = htole32(IWM_MVM_LMAC_SCAN_FLAG_PASS_ALL |
 671             IWM_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE |
 672             IWM_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL);
 673         if (isset(sc->sc_enabled_capa,
 674             IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 675                 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
 676
 677         req->flags = htole32(IWM_PHY_BAND_24);
 678         if (sc->nvm_data->sku_cap_band_52GHz_enable)
 679                 req->flags |= htole32(IWM_PHY_BAND_5);
 680         req->filter_flags =
 681             htole32(IWM_MAC_FILTER_ACCEPT_GRP | IWM_MAC_FILTER_IN_BEACON);
 682
 683         /* Tx flags 2 GHz. */
 684         req->tx_cmd[0].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL |
 685             IWM_TX_CMD_FLG_BT_DIS);
 686         req->tx_cmd[0].rate_n_flags =
 687             iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_2GHZ, 1/*XXX*/);
 688         req->tx_cmd[0].sta_id = sc->sc_aux_sta.sta_id;
 689
 690         /* Tx flags 5 GHz. */
 691         req->tx_cmd[1].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL |
 692             IWM_TX_CMD_FLG_BT_DIS);
 693         req->tx_cmd[1].rate_n_flags =
 694             iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_5GHZ, 1/*XXX*/);
 695         req->tx_cmd[1].sta_id = sc->sc_aux_sta.sta_id;
 696
 697         /* Check if we're doing an active directed scan. */
 698         nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX);
 699         for (i = 0; i < nssid; i++) {
 700                 req->direct_scan[i].id = IEEE80211_ELEMID_SSID;
 701                 req->direct_scan[i].len = MIN(ss->ss_ssid[i].len,
 702                     IEEE80211_NWID_LEN);
 703                 memcpy(req->direct_scan[i].ssid, ss->ss_ssid[i].ssid,
 704                     req->direct_scan[i].len);
 705                 /* XXX debug */
 706         }
 707         if (nssid != 0) {
 708                 req->scan_flags |=
 709                     htole32(IWM_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION);
 710         } else
 711                 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAG_PASSIVE);
 712
 713         req->n_channels = iwm_mvm_lmac_scan_fill_channels(sc,
 714             (struct iwm_scan_channel_cfg_lmac *)req->data, nssid);
 715
 716         ret = iwm_mvm_fill_probe_req(sc,
 717                             (struct iwm_scan_probe_req *)(req->data +
 718                             (sizeof(struct iwm_scan_channel_cfg_lmac) *
 719                             sc->sc_capa_n_scan_channels)));
 720         if (ret) {
 721                 free(req, M_DEVBUF);
 722                 return ret;
 723         }
 724
 725         /* Specify the scan plan: We'll do one iteration. */
 726         req->schedule[0].iterations = 1;
 727         req->schedule[0].full_scan_mul = 1;
 728
 729         /* Disable EBS. */
 730         req->channel_opt[0].non_ebs_ratio = 1;
 731         req->channel_opt[1].non_ebs_ratio = 1;
 732
 733         ret = iwm_send_cmd(sc, &hcmd);
 734         if (!ret) {
 735                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 736                     "Scan request was sent successfully\n");
 737         }
 738         free(req, M_DEVBUF);
 739         return ret;
 740 }
 741
 742 static int
 743 iwm_mvm_lmac_scan_abort(struct iwm_softc *sc)
 744 {
 745         int ret;
 746         struct iwm_host_cmd hcmd = {
 747                 .id = IWM_SCAN_OFFLOAD_ABORT_CMD,
 748                 .len = { 0, },
 749                 .data = { NULL, },
 750                 .flags = IWM_CMD_SYNC,
 751         };
 752         uint32_t status;
 753
 754         ret = iwm_mvm_send_cmd_status(sc, &hcmd, &status);
 755         if (ret)
 756                 return ret;
 757
 758         if (status != IWM_CAN_ABORT_STATUS) {
 759                 /*
 760                  * The scan abort will return 1 for success or
 761                  * 2 for "failure".  A failure condition can be
 762                  * due to simply not being in an active scan which
 763                  * can occur if we send the scan abort before the
 764                  * microcode has notified us that a scan is completed.
 765                  */
 766                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 767                     "SCAN OFFLOAD ABORT ret %d.\n", status);
 768                 ret = ENOENT;
 769         }
 770
 771         return ret;
 772 }
 773
 774 static int
 775 iwm_mvm_umac_scan_abort(struct iwm_softc *sc)
 776 {
 777         struct iwm_umac_scan_abort cmd = {};
 778         int uid, ret;
 779
 780         uid = 0;
 781         cmd.uid = htole32(uid);
 782
 783         IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending scan abort, uid %u\n", uid);
 784
 785         ret = iwm_mvm_send_cmd_pdu(sc,
 786                                    iwm_cmd_id(IWM_SCAN_ABORT_UMAC,
 787                                               IWM_ALWAYS_LONG_GROUP, 0),
 788                                    0, sizeof(cmd), &cmd);
 789
 790         return ret;
 791 }
 792
 793 int
 794 iwm_mvm_scan_stop_wait(struct iwm_softc *sc)
 795 {
 796         struct iwm_notification_wait wait_scan_done;
 797         static const uint16_t scan_done_notif[] = { IWM_SCAN_COMPLETE_UMAC,
 798                                                    IWM_SCAN_OFFLOAD_COMPLETE, };
 799         int ret;
 800
 801         iwm_init_notification_wait(sc->sc_notif_wait, &wait_scan_done,
 802                                    scan_done_notif, nitems(scan_done_notif),
 803                                    NULL, NULL);
 804
 805         IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Preparing to stop scan\n");
 806
 807         if (isset(sc->sc_enabled_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN))
 808                 ret = iwm_mvm_umac_scan_abort(sc);
 809         else
 810                 ret = iwm_mvm_lmac_scan_abort(sc);
 811
 812         if (ret) {
 813                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "couldn't stop scan\n");
 814                 iwm_remove_notification(sc->sc_notif_wait, &wait_scan_done);
 815                 return ret;
 816         }
 817
 818         IWM_UNLOCK(sc);
 819         ret = iwm_wait_notification(sc->sc_notif_wait, &wait_scan_done, hz);
 820         IWM_LOCK(sc);
 821
 822         return ret;
 823 }